Actions such as opening a bypass valve on a cylinder, sharing air, and breathing directly from the cylinder are possible solutions to air emergencies. Thus the correct answer is D.
<h3>What is Breathing?</h3>
Breathing is referred to as a procedure in which an individual inhales and exhales the air. In breathing the air is taken from the nose and then reaches to lungs and then moves out the air from the lungs to perform air exchange for survival.
In case of Air emergency actions such as bypassing the valve on the cylinder, sharing of air and breathing directly from the cylinder can be performed to avoid any misfortune.
Therefore, option D is appropriate.
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Your question is incomplete, probably the complete question/missing part is:
Actions such as opening a bypass valve on a cylinder, sharing air, and breathing directly from the cylinder are:
Select one:
a. never allowed according to SOPs.
b. suggested responses to structural collapse.
c. unlikely to occur at a search and rescue operation.
d. possible solutions to air emergencies.
