Which of the following sentences is a statement?

Question

$\begin {array} {1 1} (A)\;The\: product \: of \: (-1) \: and \: 8 \: is\: 8 & \quad (B)\;Today\: is\: a\: windy\: day. \\ (C)\;He \: is\: a\: doctor. & \quad (D)\;Where\: is\: she\: going? \end {array}$