The correct answer is (A). He spoke with a whisper.
A whisper is a very soft way of speaking, usually so that other people cannot hear you. It is often used when you want to keep something secret, or when you do not want to disturb other people.
The other options are incorrect because they do not make sense in the context of the sentence.
(B) Into a whisper is not grammatically correct. You cannot speak into a whisper. You can speak in a whisper, but you cannot speak into a whisper.
(C)
Like a whisper is also not grammatically correct. You cannot speak like a whisper. You can speak in a whisper, but you cannot speak like a whisper.(D) In a whisper is grammatically correct, but it does not make sense in the context of the
sentence. The sentence is about how the man spoke, not where he spoke.Therefore, the correct answer is (A). He spoke with a whisper.