Let's break down the sentence and determine the appropriate connotations for each blank based on the context clues:
- "A dedicated gourmand, Franklin's expression became (i) $\qquad$ when the doctor delivered her advice."
- A "gourmand" is someone who loves and often consumes large amounts of food, especially rich food.
- The doctor's advice, considering the later mention of "decadent confections," is clearly about dietary restrictions.
- Given that Franklin is a "dedicated gourmand," receiving advice to cut down on treats would likely evoke a negative or displeased reaction. Therefore, Blank (i) needs a word indicating an unhappy, gloomy, or disapproving expression.
- "Though he would not have to be completely (ii) $\qquad$ , his physician did warn him to cut down on decadent confections."
- The word "Though" signals a contrast. He doesn't have to go to an extreme, but he does need to reduce consumption.
- "Cut down on decadent confections" implies reducing indulgence.
- Blank (ii) needs a word that describes an extreme level of self-denial or abstention, contrasting with the partial restriction advised.

Let's evaluate the options:

For Blank (i):
- A. effervescent: Lively, enthusiastic, bubbly. This is a positive emotion and doesn't fit the context of a gourmand receiving restrictive advice.
- B. dour: Sullen, gloomy, severe, or ill-humored. This perfectly captures the sense of disappointment or displeasure a gourmand might feel.
- C. wrathful: Full of intense anger. While possible, "dour" suggests a more subdued but fitting negative reaction like sullenness or gloom, rather than outright rage, for dietary advice. "Dour" is a strong fit.

For Blank (ii):
- D. ascetic: Characterized by severe self-discipline and abstention from all forms of indulgence, typically for religious reasons. This strongly fits the idea of extreme self-denial regarding food, making a good contrast with "not have to be completely."
- E. temperate: Showing moderation or self-restraint. While related to diet, "temperate" implies moderation, not extreme abstention. The phrase "not have to be completely temperate" would sound awkward and less impactful than "not have to be completely ascetic" when contrasted with "cutting down" (which is a step towards temperance itself).
- F. sanctimonious: Making a show of being morally superior to other people; holier-thanthou. This describes a moral attitude, not a dietary practice.

Combining the best fits:
- Blank (i): dour (gloomy, displeased)
- Blank (ii): ascetic (characterized by severe self-denial)

The completed sentence reads: "A dedicated gourmand, Franklin's expression became dour when the doctor delivered her advice. Though he would not have to be completely ascetic, his physician did warn him to cut down on decadent confections." This sentence is logically coherent and grammatically correct.