Find the Sum or Difference $\left( 5 m ^ { 2 } z ^ { 4 } \right) \left( 3 m ^ { 3 } z ^ { 2 } \right)$

Multiple Choice

Find the sum or difference.
- $\left( 5 m ^ { 2 } z ^ { 4 } \right) \left( 3 m ^ { 3 } z ^ { 2 } \right)$

A) $15 \mathrm { mz } ^ { 6 }$
B) $15 \mathrm { mz } ^ { 5 }$
C) $15 \mathrm {~m} ^ { 5 } \mathrm { z } ^ { 6 }$
D) $15 \mathrm {~m} ^ { 5 } \mathrm { z }$