Small things can make a big difference to the environment． In daily life， we can       to protect the environment．（　　）

①give out food to homeless people

②use cloth bags instead of plastic bags

③turn off the lights when leaving a room

④help the old people in the neighborhood

⑤ride bikes or walk to school rather than go to school by car

A．

②④⑤

B．

①③④

C．

②③⑤