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

20.
"If you don't keep quite I shall shoot you", he said to her in a calm voice.

A.
He warned her to shoot if she didn't keep quite calmly.
B.
He said calmly that I shall shoot you if you don't be quite.
C.
He warned her calmly that he would shoot her if she didn't keep quite.
D.
Calmly he warned her that be quite or else he will have to shoot her.