I couldn't find that much but I found the same question as yours and this is another person comment. :3 hopefully that help :D
A diet that can lower your stress looks like something with a lot of fruits and vegis. Making sure you get a least one hour of exercise a day. Plus drinking tons of water and a some juices. Foods I'd consider would be pineapples, strawberries, bananas, cucumbers, carrots, and etc.
The answer is a. (in terms of performing cpr on a adult) hope this helps
Factors That Affect BAC
-Body size
-Biological sex
-Physical condition
-Medications you take
-What you've eaten (and when)
-How much sleep you've had
-Alcohol content of your drinks
The umbilical cords carries nutrients that are entered into mothers bloodstream to the fetus.