An important factor in the history of water pollution control is ...

[magmichele12]

An important factor in the history of water pollution control is that
 
  a. the nonnational governments were without jurisdiction in controlling polluters within their boundaries.
  b. the national government preempted statelocal roles when society recognized the effects of polluted wateron neighboring jurisdictions.
 c. the nonnational governments were anxious for federal involvement.
  d. such control was a traditional role for the national government from the earliest days of the nation.

Question 2

Ethnic Russians make up about _________ percent of the population of Russia.
 
  a. 50
  b. 60
  c. 90
  d. 80
  e. 40

[Natalie4ever]

Answer to Question 1

b

Answer to Question 2

d