I need help on 2 & 3

Injuries in the environment are a result of a. lower level activities. b. irresponsibility. c. mismatch between a child's abilities and activities. d. children not paying attention.

Mucous membranes.. a. cover or line external surface of body. b. line internal body surfaces that are in contact with the environment. c. produce antibodies to combat infection. d. secrete sweat, which has antibacterial enzymes.

Brian said that when you get your body broken such as a arm or leg. it means your bones break to pieces and must do surgery or get a cast to fix it.is it true or false?