Add or Subtract as Indicated $\frac{3}{10 x}+\frac{9}{14 x^{2}}$ A) $\frac{108}{70 x^{2}}$ B) $\frac{12}{140 x^{2}}$

Multiple Choice

Add or subtract as indicated.
- $\frac{3}{10 x}+\frac{9}{14 x^{2}}$

A) $\frac{108}{70 x^{2}}$

B) $\frac{12}{140 x^{2}}$

C) $\frac{3(7 x+15) }{70 x^{2}}$

D) $\frac{12}{10 x+14 x^{2}}$