Solve Write the Answer in Simplest Form $\frac { 1 } { 12 }$

Multiple Choice

Solve. Write the answer in simplest form.
-Sophie readd $\frac { 1 } { 12 }$ of her book on Monday, $\frac { 4 } { 12 }$ of her of herbook on Tuesday, andnd $\frac { 2 } { 12 }$ of he of hr book on Wednesday. What part of her book has she read?

A) $\frac { 7 } { 12 }$
B) $\frac { 5 } { 12 }$
C) $\frac { 12 } { 5 }$
D) $\frac { 12 } { 7 }$