From the words lettered A to D, choose the word or group of words that best completes each of the following sentences. We haven't confirmed.....signature th...

From the words lettered A to D, choose the word or group of words that best completes each of the following sentences.
We haven't confirmed.....signature this is

Answer Details

The correct answer is "whose". "Whose" is used to indicate possession and it is asking who the signature belongs to.