During a lab experiment, Mandy and her lab partner work with corrosive chemical substances. What is the proper way to dispose of these chemicals after the lab is completed?
A.
The chemicals should be washed down the sink with plenty of water.
B.
The chemicals should be poured in the trash can.
C.
The chemicals should be mixed together and left unmarked in the lab area.
D.
The chemicals should be placed in marked waste containers.