Which of the following sentences is correct?

Explanation:

Analyzing the given options -

A: This sentence is correct as we need to describe here how the internet is used and the adverb ‘rarely’ is correctly used here.

B: ‘Rarity’ is spelled incorrectly and hence this sentence becomes wrong.

C: In the given sentence, we need to describe how the internet is used and in order to do that we need an adverb and ‘rare’ is an adjective. Hence, this sentence is also wrong.

D: Here the adjective ‘rare’ is not used correctly and moreover we need an adverb to describe how the internet is used. So, this option is also wrong.

Final Answer:

The correct answer option is A i.e., I rarely use the internet.