ACT Problem 49

$$\begin{array}{lcl} 49.\:If\:t< 0\:and\:(t-1)^{2}=16\:\\ What\:is\:the\:value\:of\:t^{2}\:?\\ \\ (A):4\\ (B):16\\ (C):-4\\ (D):9\\ (E):36\\ \end{array}$$