You created the following data frame.

dataframe$\_$practice

A B C

$1$ XXX $2030$

$2$ YYY $3015$

What would be the output of the following code?

dataframe$\_$practice$D $<-$ c$($Apple$,$ IBM$)$

dataframe$\_$practice

Question $6$Answer

A$.$

A B C

$1$ XXX $2030$

$2$ YYY $3015$

$3$ D Apple IBM

B$.$

Error message

C$.$

A B C D

$1$ XXX $2030$ Apple

$2$ YYY $3015$ IBM

D$.$

A B C

$1$ XXX $2030$

$2$ YYY $3015$