I got it wrong someone pls help

it's filtration, but this is an assumption so my apologies if i got this

b. accuracy of the data matters alot more than its number of digits, organization or amount of detail. quantitative observation is more accepted than the qualitative observation.

water at room temperature is flowing through a pipe with pressure taps located 10 ft apart along one section of the pipe, which are connected to a mercury (s=13.6) manometer.

elements make up everything, and they combine to make compounds.

the answer is c