Find the Greatest Common Factor of the Given Expression $15 z ^ { 4 } c ^ { 6 } , 10 z ^ { 3 } c ^ { 7 } \text { and } 55 z ^ { 6 } c ^ { 2 }$

Multiple Choice

Find the greatest common factor of the given expression. $15 z ^ { 4 } c ^ { 6 } , 10 z ^ { 3 } c ^ { 7 } \text { and } 55 z ^ { 6 } c ^ { 2 }$

A) $2 c ^ { 5 }$
B) $5 z c ^ { 4 }$
C) $3 z ^ { 8 } c ^ { 2 }$
D) $5 z ^ { 3 } c ^ { 2 }$