Select the option that will improve the underlined part of the given sentence. In case no improvement is needed, select 'No improvement required'.

In India, processed foods becomes popular in the 20th century.

became popular in

The correct sentence is:

In India, processed foods became popular in the 20th century.

The verb "become" is in the past tense because it is describing an event that happened in the past. The word "popular" is an adjective, so it should not be in the gerund form ("popularity"). The word "at" is not needed in this sentence.