Question

Which of the following is a common source of groundwater pollution?

Oil dumping and oil spills

Tossing candy bar wrappers into a stream

Flushing household chemicals down the toilet

Leaking storage containers outside factories

Answer 1

Since these are all sources of pollution, I would focus on the aspect of pollution in question. Lets reword: Which of these options pollutes the groundwater?

This may help: http://en.wikipedia.org/wiki/Groundwater

Answer 2

oil dumping

Answer 3

thanks!