The answer is source B because it has a listed author who is an expert and it is the governments organization website which are more reliable that a .com website. Source A does not even list the author so you do not know who wrote it could be anyone.
Answer:
"heart attacks are most often caused by a sudden drop in blood pressure."
The answer i found when i looked it up was <span> pulmonary</span>
13. <span>Gluteus Maximus: Trapezius because the contraction of one doesn't necessarily lengthen the other.
14. </span><span>Decreased bone mass because strength training adds bone density, keeps the volume, so therefore increases the mass.
15. Not 100% what long/short is, and I'm not 100% sure of the answer. I'm going to say large/small because you already work out the smaller muscles during the working out of the large muscles.
16. The only one that one should stick by 100% is maintaining proper posture, form, and technique. But, this is health, and not bodybuilding. So, maintaining the core tension at all times. You don't need to do that for something that doesn't require the core. </span>
