Write Each Rate or Ratio as a Fraction in Lowest $\$ 20$

Write each rate or ratio as a fraction in lowest terms.
Change to the same units when necessary.
- $\$ 20$ for 100 minutes

A) $\frac{5 \text { minutes }}{\$ 1}$
B) $\frac{\$ 1}{5 \text { minutes }}$
C) $\frac{100 \text { minutes }}{\$ 20}$
D) $\frac{\$ 20}{100 \text { minutes }}$