Problem 4

$$\begin{array}{lcl} 4.\:x=1234567891011121314\:...\:585960\\ x\:is\:formed\:by\:writing\:the\:numbers\: 1\:to \\ 60,\:as\:you\:can\:see\:above.\:What\:is\:the\:\\ 90th\:digit\:of\:x,\:counting\:from\:left\:?\\ \\ (A)\:9\\ \\ (B)\:3\\ \\ (C)\:5\\ \\ (D)\:2\\ \\ (E)\:0\\ \end{array}$$