Find the Product $\left( 7 p ^ { 3 / 5 } + 4 p ^ { 4 / 5 } \right) ^ { 2 }$

Multiple Choice

Find the product. Assume variables represent positive real numbers.
- $\left( 7 p ^ { 3 / 5 } + 4 p ^ { 4 / 5 } \right) ^ { 2 }$

A) $49 p ^ { 6 / 5 } + 28 p ^ { 7 / 5 } + 16 p ^ { 8 / 5 }$
B) $49 p^{6 / 5}+56 p^{7 / 5}+16 p^{8 / 5}$
C) $49 p ^ { 9 / 25 + 7 p }$
D) $14 \mathrm { p } ^ { 6 / 5 } + 28 \mathrm { p } ^ { 8 / 5 } + 8 \mathrm { p } ^ { 8 / 5 }$