The Electoral College determines the president and vice president. Each state is given two votes in the college, as well as extra seats based on the state’s population. What is the purpose of the distribution of seats

A.
to ensure that the best candidate is elected president

B.
to ensure that the president is supported by most citizens

C.
to ensure the president equally represents small and large states

D.
to ensure that the president best represents the more populated states
I don't know what to put. Please help or give me pointers :D

What do you think this means?

“ ... as well as extra seats based on the state’s population.”