The answer is D all of the above
Hi,
Elite athletes typically have a higher risk of b. hip and spine fracture than other
individuals who participate in low to moderate levels of physical
activity.
b. hip and spine fracture
I think it’s A (students often walked or rode bikes to school).
The advantage of the mRNA vaccines is that they don't use your body's own immune system.
<h3>What is mRNA vaccine?</h3>
The mRNA vaccine makes use of the messenger RNA to trigger the body into an immune response. This occurs by instructing the cells to make a protein that is similar to that of the attacking agent.
Thus, the advantage of the mRNA vaccines is that they don't use your body's own immune system.
Learn more about mRNA vaccine:brainly.com/question/23134032
# SPJ1