Decide What Values of the Variable Cannot Possibly Be Solutions $\frac { 56 } { 3 } \mathrm { hr }$

Multiple Choice

Decide what values of the variable cannot possibly be solutions for the equation.
-An experienced accountant can prepare a tax return in 8 hours. A novice accountant can do the job in 14 hours. How long will it take them to do the job working together?

A) $\frac { 56 } { 3 } \mathrm { hr }$
B) $\frac { 1 } { 22 } h r$
C) $\frac { 1 } { 112 } \mathrm { hr }$
D) $\frac { 56 } { 11 } \mathrm { hr }$