In the question below, the sentence has been given in Direct/Indirect speech. From the given alternatives, choose the one which best expresses the given sentence in Indirect/Direct speech.

"Are you alone, my son?" asked a soft voice close behind me.

A.

A soft voice asked that what I was doing there alone.

B.

A soft voice said to me are you alone son.

C.

A soft voice from my back asked If I was alone.

D.

A soft voice behind me asked If I was alone.

Correct answer is D

No explanation has been provided for this answer.