What is the structure and $IUPAC$ name of the compound,allyl amine?

• A
  $CH_{2}=CH-CH_{2}-NH_{2}$,prop$-2-$en$-1-$amine
• B
  $CH_{3}-CH=CH-NH_{2}$,prop$-1-$en$-1-$amine
• C
  $CH_{2}=C(CH_{3})-NH_{2}$,$2$-methylprop$-1-$en$-1-$amine
• D
  $CH_{2}=CH-NH_{2}$,ethenamine