You Are Assigned to Write the Report to the Environment

You are assigned to write the report to the Environment Canada to help them decide what level of 17ß-estradiol to permit in sewage output.You do not want to make the level any lower than necessary,because it requires substantial additional money for the extra treatment of sewage.What level of 17ß-estradiol would you suggest is safe to prevent feminization of fish?

A) 2) 5 ng/l
B) 5 ng/l
C) 12.5 ng/l
D) 25 ng/l
E) 100 ng/l