Add as Indicated $\frac{2}{21}+\frac{1}{7}$ A) $\frac{1}{14}$ B) $\frac{5}{42}$ C) $\frac{3}{28}$ D) $\frac{5}{21}$

Multiple Choice

Add as indicated. Write the answer as a fraction in lowest terms.
- $\frac{2}{21}+\frac{1}{7}$

A) $\frac{1}{14}$

B) $\frac{5}{42}$

C) $\frac{3}{28}$

D) $\frac{5}{21}$