Suppose there had been no precipitation during 1 entire month of the 12-month period. Base
A.significant wet deposition of all 4 substances.
B.significant wet deposition of Cu2+ and Zn2+, but no wet deposition of Cl- and SO4 2-.
C.no wet deposition of any of the 4 substances.
D.no wet deposition of Cu2+ and Zn2+, but significant wet deposition of Cl- and SO4 2-.