Which of the Following Reacts With $\left(\mathrm{CH}_{3} \mathrm{CH}_{2}\right)_{2} \mathrm{NH}$ To Give the Compound Shown Below

Multiple Choice

Which of the following reacts with $\left(\mathrm{CH}_{3} \mathrm{CH}_{2}\right) _{2} \mathrm{NH}$ to give the compound shown below?
$\mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{CH}=\mathrm{CHN}\left(\mathrm{CH}_{2} \mathrm{CH}_{3}\right) _{2}$

A) A
B) B
C) C
D) D