Answer:
the researchers had different operational definitions.
Explanation:
Running, Swimming, Dancing, biking, are some main ones.
Answer:
The correct answer is A
Explanation:
To avoid complications during surgery, patients should have adequate blood volume, if the donates blood in a week and is operated on in 2 months, there should be a prudent time, for hematopoiesis, to compensate for the donated.
Answer:
I think B
Explanation:
I'm pretty sure it's birth control pills?? Do they actually teach you those at school?
