I would say b. c. & d. because the question is asking how to stay safe before, not during.
e. decision making because a means that you have not reached a conclusion, be is more of "i only have so much" type of answer, c does not make sense, and definitely not d.
<span>B.
Charlie should repeat the caliper test because it does not fit with the
other information, and he should start an exercise routine and diet to
reduce his body fat</span>
