The resulting variable x$=[$zeros$(1,4)$;ones$(1,4)$;zeros$(1,4)$;$2*$ones$(1,4)]^3$;

x$=$x$($:$,2)$ is a

A$.$ string variable

B$.$ column vector variable

C$.$ row vector variable

D$.$ matrix variable

E$.$ scalar variable

F$.$ indicates a comment, everything to the right is ignored

G$.$ Cannot tell from the information given.

H$.$ suppresses output of the command