PLS HELP!! :( THIS IS 200 PTS!!) ( I WILL MARK BRAINIEST WHEN SOMEONE ANSWERS CORRECTLY FIRST)

Which of the following best explains participation in Australian national elections?

A
Every resident who is at least 18 is allowed to vote.

B
Every subject of Great Britain who is at least 18 is allowed to vote.

C
Every eligible citizen who is at least 18 is required to vote.

D
Every British citizen who is at least 18 is required to vote.