Subtract the Fractions Below, and Express the Answer in Its $\frac { 10 } { z } - \frac { 2 } { b }$

Multiple Choice

Subtract the fractions below, and express the answer in its lowest terms. $\frac { 10 } { z } - \frac { 2 } { b }$

A) $\frac { 10 b + 2 z } { z b }$
B) $\frac { 10 b - 2 z } { z b }$
C) $\frac { 10 b - 2 z } { b }$
D) none of these