Which of the following are the reasons for pouring used acids and alkalis into waste bottles instead of the sink? (1) acids and alkalis may corrode the pipes.
(2) acids and alkalis are harmful to the environment.
(3) acids and alkalis should be collected for treatment before discharge.
A (1) and (2) only
B (1) and (3) only
C (2) and (3) only
D (1), (2) and (3)