<span>C. Is the correct answer here - bought is based on the root verb 'buy or to buy' but its sense in the sentence is set against the framework of a time from the phrase with the word 'During' and so the word of choice must become 'bought'.</span>
Answer:
A) healthy diets the world over
Explanation:
In B, the word <em>women</em> narrows down the topic, and so do the words <em>factors</em> in C and<em> fiber</em> and <em>men's</em> in D.
Healthy diets the world over is the broadest topic of all.