\(\underbrace {{\rm{a}} + {\rm{a}} + {\rm{a}} + \ldots + {\rm{a}}}_{{\rm{n\;times}}} = {{\rm{a}}^2}{\rm{b\;}}\) and \(\underbrace {{\rm{b}} + {\rm{b}} + {\rm{b}} + \ldots + {\rm{b}}}_{{\rm{m\;times}}} = {\rm{a}}{{\rm{b}}^2}\), where

\(\underbrace {{\rm{a}} + {\rm{a}} + {\rm{a}} + \ldots + {\rm{a}}}_{{\

1.	\(\underbrace {{\rm{a}} + {\rm{a}} + {\rm{a}} + \ldots + {\rm{a}}}_{{\rm{n\;times}}} = {{\rm{a}}^2}{\rm{b\;}}\) and \(\underbrace {{\rm{b}} + {\rm{b}} + {\rm{b}} + \ldots + {\rm{b}}}_{{\rm{m\;times}}} = {\rm{a}}{{\rm{b}}^2}\), where
A.	2a2b2
B.	a4 b4
C.	ab(a + b)
D.	a2 + b2
Answer» C. ab(a + b)