Which of the following reactions can be used to make ethyl isocyanide?
A. `CH_(3)CH_(2)NH_(2) +CHCI_(3) overset(KOH)underset(Delta)rarr`
B. `CH_(3) CH_(2)Br+AgCNrarr`
C. `CH_(3)CH_(2)-NH-underset(O)underset(||)(C)-Hoverset(POCI_(3))rarr`
D. `CH_(3)CH_(2)Br+KCNrarr`
