Add or Subtract the Radical Expressions as Indicated, If Possible $3 m \sqrt { 125 m ^ { 2 } } + m ^ { 2 } \sqrt { 180 }$

Multiple Choice

Add or subtract the radical expressions as indicated, if possible. $3 m \sqrt { 125 m ^ { 2 } } + m ^ { 2 } \sqrt { 180 }$

A) $21 \mathrm {~m} ^ { 2 } \sqrt { 5 }$
B) $111 \mathrm {~m} ^ { 2 } \sqrt { 5 }$
C) $111 \mathrm {~m} \sqrt { 5 }$
D) Cannot be simplified further