Correct option is D
The correct sentence is (d)
They have recently arrived.
Explanation: The adverb “recently” should be placed between the auxiliary verb “have” and the main verb “arrived” for proper usage.
Grammatical Rule Used:
In present perfect tense, adverbs of time like “recently”, “already”, “just”, etc., are placed between the auxiliary verb and the main verb.
Example: She has already eaten.
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Information Booster:
Avoid placing adverbs at the end if it affects the natural flow or clarity of the sentence.