Amother sprints across the yard to grab her small child before he enters the street. the mother is using her a. type i a slow-twitch muscle fibers that provided her with a fast burst of movement b. type ii b fast-twitch muscle fibers that respond quickly and provide her with speed and strength c. type i b intermediate-twitch muscle fibers that respond quickly because they are delivered energy aerobically d. type ii a fast-twitch muscle fibers that act rapidly because they are delivered energy anaerobically

I'm pretty sure it's B .

Explanation:

the mother needs to act fast to grab her child and she needs strength to pick up her child.

 B

Explanation: Because I just took the practice!

what are the choices?

exposure to hazardous carcinogens and toxic substances can cause breathing problems, such as copd and various types of cancer. it also increases the risk of heart attacks and strokes and has serious (but no less unattractive) side effects, such as aging, yellow teeth, a terrible smell and damage to the vocal cords.