Jacques E. Brandenberger invented a product which is more of a plastic film (plastic films are usually not opaque i.e. diaphanous)

Originally Jacques wanted to invent plastic coat fabric instead he ended up creating plastic film like paper, which is more useful than plastic fiber coat, and the usefulness of the product is visible/ immediately apparent and an ubiquitous(can be used almost in all places) product was found.

How many read "ingenous" as ingenious and picked it?!

The correct words for the blanks are (i) diaphanous, (ii) immediately apparent, and (iii) a ubiquitous.

Breakdown of the Blanks
- Blank (i): A. diaphanous

The sentence highlights the surprising fact that cellophane, a transparent material, is made from the same components as an opaque brown paper bag. The word diaphanous means light, translucent, and delicate, which perfectly describes the appearance of cellophane and creates the necessary contrast with the paper bag.
- Blank (ii): E. immediately apparent

The sentence states that the clear plastic film had "overwhelming usefulness" and that its inventor pivoted from his original plan to focus on it. The phrase immediately apparent means that the usefulness was obvious right away, leading to the rapid shift in focus.
- Blank (iii): I. a ubiquitous

The final blank describes the product that was born. Since the clear plastic film's usefulness was "overwhelming" and "immediately apparent," it makes sense that it became widespread and is found everywhere. The word ubiquitous means present or found everywhere, which accurately describes the product's success and common use today.