The maximum value of $\begin{vmatrix}1 & 1 & 1\\1 & 1-sin\theta & 1\\1-\cos\theta & 1 & 1\end{vmatrix}\;(is\;\theta\; is\; real\;number)$

Question

$$\begin{array}{1 1}(A)\quad \frac{1}{2} & (B)\quad \frac{\sqrt 3}{2}\\(C)\quad \sqrt 2 & (D)\quad \frac{2\sqrt 3}{4}\end{array}$$