请选择ABCD'`8h:m'n6`)W5O)i6g9m-J(xIt is very ______ of you to make such stupid mistakes.3F:{7n/C4i6R7](h:x8~
A. clever3F:{7n/C4i6R7](h:x8~
B. nice3F:{7n/C4i6R7](h:x8~
C. kind3F:{7n/C4i6R7](h:x8~
D. silly3F:{7n/C4i6R7](h:x8~