I believe that item is: Defibrillator
The recommendations that made by ANSI are the items that could be used even in small working sites.
Defribrilators requires a pretty huge amount of electrical supply which make them unable to be brought to small working sites.
The first one goggles helmet and bicycle bc you need the bike for going on the track
Resting heart rate will be decreased, because your heart and cardiovascular system are being worked out, therefore increasing the muscle tissue within the heart and thereby making it stronger, which makes it beat more powerfully and yeah. So Resting heart rate is the correct answer
From experience with my best friend, I´d say C.