A person blowsinto open-end of a long pipe. As a result, a high-pressure pulseof air travels down the pipe. Whenthis pulse reachesthe other endof the pipe,

A

a high-pressure pulsestarts traveling up the pipe, if the other end of the pipe is open.

B

a low-pressure pulsestarts traveling up the pipe, if the other end ofthe pipe is open.

C

alow-pressure pulsestarts traveling up the pipe, if the other end of the pipe is closed.

D

a high-pressure pulse starts traveling up the pipe, if the other end of the pipe is closed.