There Are Two Surgical Technicians Responsible for Cleaning and Maintaining $\frac { 1 } { 4 }$

Multiple Choice

There are two surgical technicians responsible for cleaning and maintaining the sterility of the surgical instruments utilized during surgery. Prior to lunch, one surgical technician cleaned $\frac { 1 } { 4 }$ of the instruments and the other cleaned $\frac { 1 } { 3 }$ of the instruments. How much of the cleaning remains?

A) $\frac { 5 } { 12 }$ of the instruments remain to be cleaned
B) $\frac { 6 } { 13 }$ of the instruments remain to be cleaned.
C) $\frac { 5 } { 3 }$ of the instruments remain to be cleaned.
D) $\frac { 7 } { 14 }$ of the instruments remain to be cleaned
E) $\frac { 5 } { 13 }$ of the instruments remain to be cleaned