Question

how did whales, once no bigger than seals, evolve to become the largest animals on earth? brazilian biologist mariana nery believes the answer might be found in whales dna. in january 2023, nery and her colleagues ______ a study showing changes over time in four whale genes associated with body size. 15 mark for review which choice completes the text so that it conforms to the conventions of standard english? a published b publishing c having published d to publish

Explanation:

The sentence is in the past - tense and describes a completed action in January 2023. The simple past - tense verb "published" is the correct form to use here. "Publishing" is the present participle, "having published" is a perfect participle which is not appropriate for this simple past - tense context, and "to publish" is an infinitive which is also incorrect for this main - verb position in a past - tense sentence.

Answer:

A. published