Two Problems Encountered in Human Health Risk Assessment Are _______________________

Two problems encountered in human health risk assessment are _______________________ and ___________________.

A) Use of chemical mixtures; lack of knowledge about synergistic effects
B) Lack of funding for federal mandates; lack of public support
C) Extrapolation of data to low doses; extrapolation of data from nonhuman species to humans
D) Lack of planning; the involvement of politics
E) There are no inherent problems in human health risk assessment