Answer:
d. neck splints
Explanation:
first off neck splints are to bulky to fit in a first aid kit common sense
Changes in the force of contraction of the heart
The answer is A.) It causes muscle hypertrophy.
A 'Trend' is a large social influence if this is what you are talking about. Trends are something where one person does/wears it (usually a popular person everyone likes) and then everyone else starts doing it.
Developmental assets increase the likelihood that a person will not engage in risky behaviors because they learn what to do and what not to do