A Sensible Increase in Training Duration for a Runner Who

Multiple Choice

A sensible increase in training duration for a runner who trains 50 miles per week would be

A) 1 mile (to 51 miles per week) .
B) 5 miles (to 55 miles per week) .
C) 10 miles (to 60 miles per week) .
D) 25 miles (to 75 miles per week) .