(Choose 1 answer)
The sizes of two matrices A and B are 2 x 1 and 1 x 1, respectively. Find the sizes of the pro if they are defined.
A. AB is 2 x 1, BA is undefined.
B. AB is 2 x 2, BA is 1 x 1.
C. AB is undefined, BA is 1x 2.
D. AB is 1 x 2, BA is 1 x 1.
E. None of the other choices is correct
Exit 49
