568 muons were counted by a detector on the top of mount washington in a one hour period of time. assuming moving muons keep time at the same rate as stationary muons, then 27 should survive until sea level. the fact that 412 muons were detected by the same equipment at sea level reveals that
a. the stationary clock measures time differently at different altitudes
b. the moving clocks keep time at the same rate as stationary clocks
c. that moving clocks run slower
d. that moving clocks run faster

Explanation:

The fact that 412 muons were detected by the same equipment at sea level reveals that moving clocks run slower. This is due to the reason of time dilation.

The time dilation slow down time with respect to external observer. The time dilation is caused due to the force of gravity and the velocity with which the object is moving.

Hence, the correct option is (c) "moving clocks run slower".

the answer would most likely be c, because if it's a comical piece of information, it may likely not be true, if it's a site that allows anybody to edit the content, it could mean a five year old is typing the info, and if it's a tv show produced by a celeb, it may have a biased opinion.