The primary difference between JFETs and depletion-type MOSFETs is（）.

A.JFETs can have positive values of and levels of drain current that exceed

B.depletion-type MOSFETs can have positive values of and levels of that exceed

C.depletion-type MOSFETs can have only positive of

正确答案：depletion-type MOSFETs can have positive values of and levels of that exceed