It isn't literal. It's a war quote meaning if you put in good and hard effort, it can save your life. In my oppinion, that can relate to more situations and circumstances in life though.
I hope this helps! i just wrote it out
Answer:
<u>D) he should perform rehabilitation exercises</u>
Explanation:
If Bert goes on vacation and misses regular exercise for three weeks, he should perform rehabilitation exercises.
<h3>Hope it is helpful....</h3>
9 months its like a normal pregnancy but with two babies at the same time.