in pure competition, producers compete exclusively on the basis of\n selling identical items.\n advertising…

in pure competition, producers compete exclusively on the basis of\n selling identical items.\n advertising heavily to promote their good.\n producing the unique features of their good.\n focusing on maintaining a positive image.
Answer
Brief Explanations:
In pure competition, products are homogeneous, meaning producers sell identical items. Heavy - advertising, unique features, and positive image - building are not exclusive bases of competition as products are perfect substitutes.
Answer:
A. selling identical items.