Situation Larry Started a Fitness Program About 8 Weeks Ago.He Runs

Situation
Larry started a fitness program about 8 weeks ago.He runs 2 miles every day and does some weight training.He likes to use weight machines and focuses on 1 or 2 muscle groups each day.He could initially do 6 repetitions of most exercises in his program,and he can now do 15-20.Larry likes the initial improvement in his energy level and appearance since starting the program.He has noticed that his work in construction seems a little easier,too.However,Larry doesn't think he is getting as much benefit out of his program now as he did at the start of his fitness program.
-All of the following can help Larry decrease his risk of injury,EXCEPT

A) alternating jogging and another endurance activity in his program (cross-training) .
B) warming up thoroughly before both endurance and strength training sessions.
C) exercising at maximum heart rate during endurance training.
D) allowing muscle groups a day of rest between strength training workouts.