What occurs when used engine oil is poured into the pit in the ground? A. The oil seeps through the soil but stops before it reaches the groundwater due to the difference in densities
B. The oil seeps through the soil until it leaks into, and mixes with, the groundwater
C. The oil creates a membrane barrier between the water table and the groundwater
D. The oil remains sealed in the small disposal pit and does not affect the groundwater
E. A. Site 2 experienced a decrease in the amount of phosphorus pollution after 1995.
F. B. Site 1 experienced major changes in its phosphorus pollution policies after 1991.
G. C. Site 2 experienced a mostly steady increase in phosphorus pollution over seven years.
H. D. Site 1 experienced a mostly steady decrease in phosphorus pollution over seven years.