Question

question 43(multiple choice worth 3 points)
(01 07 lc)your cardiovascular system gets better when you increase the time and intensity of your workouts. what should the word in italics be replaced with to make this sentence more precise?
stronger and more efficient
weaker and more intense
faster and more important
healthier and more frequent

Explanation:

When you increase the time and intensity of workouts, the cardiovascular system becomes stronger as the heart muscle is exercised and more efficient in pumping blood and delivering oxygen. The other options do not accurately describe the positive - effect on the cardiovascular system.

Answer:

A. Stronger and more efficient