问题详情

Based on the results of Study 1, the average monthly wet deposition for Cu2+ over the 12-month period was:
A.less than 50 μg/m2.
B.between 50 μg/m2 and 75 μg/m2.
C.between 75 μg/m2 and 100 μg/m2.
D.greater than 100 μg/m2.请帮忙给出正确答案和分析，谢谢！