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Please provide the full explanations. I inferred that the remedies were not effective, hence I picked untested and spurious.

Analysis of the Sentence
1. Identify the relationship: The sentence establishes a condition ("Unless the government can dispense with...") that is necessary to prevent a negative outcome ("the population will continue to suffer... under the delusion that the government had actually endeavored to handle the crisis in an innovative fashion.").
2. Determine the required meaning:
- The government is currently using remedies that are not innovative.
- The government needs to get rid of the "heretofore $\_\_\_\_$ remedies."
- Therefore, the blank must mean the opposite of innovative-something unoriginal, dull, ordinary, or conventional.

Evaluating the Options
We need a synonym pair meaning unoriginal or commonplace.
- A. untested: Never been tried before. (Not the opposite of innovative; an innovative solution could be untested.)
- B. spurious: False or fake. (Irrelevant to the degree of innovation.)
- C. transitory: Lasting only for a short time. (Irrelevant.)
- D. fleeting: Passing swiftly. (Synonym for transitory, irrelevant.)
- E. prosaic: Having the style or diction of prose; unromantic, dull, or commonplace. (Strong Fit)
- F. pedestrian: Lacking inspiration or excitement; dull, ordinary, or conventional. (Strong Fit)

The words prosaic and pedestrian are excellent synonyms for unoriginal and uninspired, which is the necessary contrast to the "innovative fashion" mentioned later in the sentence.

The correct answers are E. prosaic and F. pedestrian.