Sandi Can Make a Quilt in 9 Days and Eva $3 \frac{3}{5}$

Multiple Choice

Sandi can make a quilt in 9 days and Eva can make a quilt in 6 days. In how many days can they make a quilt working together?

A) $3 \frac{3}{5}$ days

B) $5 \frac{2}{9}$ days

C) $3 \frac{5}{18}$ days

D) $4 \frac{1}{2}$ days