During an independent emergency ascent, you should stop periodically and attempt to inhale through your regulator because:. a) Doing so reduces the risk of decompression sickness.
b) Doing so reduces the risk of lung-overpressure injuries.
c) The decreasing pressure may allow your regulator to function, even if it could not do so at depth.
d) The air in your cylinder will expand on ascent, allowing you to breathe.

c) The decreasing pressure may allow your regulator to function, even if it could not do so at depth.

Explanation:

During an independent emergency ascent, you should stop periodically and attempt to inhale through your regulator because:

c) The decreasing pressure may allow your regulator to function, even if it could not do so at depth.

answer(c); cultural values may have affected jack's grandmother's and aunt's belief about extended family;

the andrews is b

hope this