Read the following informational paragraph

Training for a five-kilometer race is a challenging, but achievable task for most healthy adults. When training for a race, the most important thing is to be consistent. A person can go from a basically sedentary lifestyle to being a five-kilometer runner in a matter of months as long as he or she consistently sticks to a training regimen. Most beginner runners start with 30-minute walk/runs in which they walk more than they run. For example, a beginner might run five minutes and walk one minute, repeating that circuit until he or she reaches 30 minutes of exercise. Gradually, a runner in training will decrease the walking and increase the running until he or she is running for 30 minutes. Most training regimens will leave about two weeks at the end of the training to simply run entire five-kilometer distances and improve time before the race.
Diet is very important when attempting to run races to lose weight as well. Consistency is key, of course, in training, since the point of training is to condition the body for longer distances. Finishing the race is an excellent reward for many weeks of hard training.
Which of the following sentences should be deleted from the paragraph because it includes details that are not important to the main focus of the paragraph?
Diet is very important when attempting to run races to lose weight as well.
Finishing the race is an excellent reward for many weeks of hard training.
When training for a race, the most important thing is to be consistent.
For example, a beginner might run five minutes and walk one minute, repeating that circuit until he or she reaches 30 minutes of Exercise

For example, a beginner might run five minutes and walk one minute, repeating that circuit until he or she reaches 30 minutes of exercise.