Which statement is true about facts and opinions? facts can be proved true or false, but opinions are always false.
facts can be proved; opinions express a person's judgement or belief. ***
both facts and opinions an be proved true or false.
facts are supported by evidence, but opinions connor be supported by evidence.

answer; i believe the correct answer is (a) the correlation between the cause variable and outcome variable is zero;

mammals. mammals of the piedmont region live in several habitats such as wetlands, fields and forests. raccoons live across the state including the piedmont. they've adapted to environmental changes, including the loss of natural habitat.