Correct Answer:
Option A - 'became popular in' will be used because '20th century' makes it clear that the sentence is in past tense.
Correct Sentence –
In India, processed foods became popular in the 20th century.
A. 'became popular in' will be used because '20th century' makes it clear that the sentence is in past tense.
Correct Sentence –
In India, processed foods became popular in the 20th century.