Which phrase in sentence 2 should be revised to maintain

a formal style?

O "pre-digital age"

O "technology-based society"

O "get with the program"

O"modern approach"

'get with the program'

Explanation:

'Get with the program' is an idiom used in informal style and tone.

An idiom is an expression or phrase that is used to convey the meaning different from it's literal meaning.

The meaning of expression 'get withh the program' means to get along with, or to become aware or current.

As sentence 2, is talking about updating the ways of learning in the digitalized age, the informal use of the expression 'get with the program' does not match with thr formal tone of the sentence.

So, the correct answer is the third option.