In Many Medical Offices, a 10% Bleach Solution Is Used $\frac { 1 } { 2 }$

In many medical offices, a 10% bleach solution is used as a disinfectant for cleaning the exam rooms. If $\frac { 1 } { 2 }$ cup of bleach is mixed with $3 \frac { 1 } { 2 }$ cups of water, how much bleach should be mixed with 7 cups of water in order to make a larger volume of this bleach solution?

A) 3 cups
B) 1 cup
C) 5 cups
D) 2 cups
E) 4 cups