A Mechanic Spent $\frac { 1 } { 3 }$ H Changing Spark Plugs

Multiple Choice

A mechanic spent $\frac { 1 } { 3 }$ h changing spark plugs, $\frac { 1 } { 7 }$ h changing an air filter and $\frac { 6 } { 7 }$ h changing the oil and oil filter. How much total time was spent servicing the car?

A) $1 \frac { 1 } { 5 }$ hours
B) $2 \frac { 1 } { 3 }$ hours
C) $8 \frac { 1 } { 5 }$ hours
D) $1 \frac { 1 } { 3 }$ hours
E) $8 \frac { 1 } { 3 }$ hours