3. interval training

a. will get you into shape in about five days.
b. involves long periods of low-intensity activity and builds stamina.
c. can guarantee an athlete an injury-free season.
d. involves short periods of intense activity and is used to build strength, speed, and power

By my mom she said it is D and please follow me

Yes... it is d. I think it is the best answer

Ithink the correct answer would be that since the disease is passed by a hand shake and can be cured with antibiotics that it could be an infection. an example could be that once when i was working in a bush camp, i got blood poisoning from blood blisters that got infected. our cook did not wash his hands after going to the bathroom and he passed staphyloccus on to the crew he fed. one other person also got a bad similar infection on the side of his face. i had to be rescued by helicopter and taken to the hospital so i wouldn't die!

I'm sorry but i don't think i can answer this because me and you probably don't have the same healthy fitness zone standards score i wish i could so sorry