In the scientific process what is the purpose of the experiment

a-to test the hypothesis

b-to prove the hypothesis true

c-to prove the hypothesis fake

d-to turn the hypothesis into a theory

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

metals are good conductor of electricity. it has free electrons on their surface. according to electron pool theory, each atom present in a metal crystal losses all of its valence electron and as a result a pool of free is form. these pool of electrons are free to move and   conduct electricity easily   while making metal as good conductor.

the correct answer is a. the ability of electrons to flow throughout the metal.

if it's not useful, feel free to report for mistake in answer.