What Is the Greatest Problem of Lake Nipissing and Many

Multiple Choice

What is the greatest problem of Lake Nipissing and many other inland lakes in Canada? 

A)  increasing the genetic diversity of the remaining fish population 
B)  controlling overfishing by various user groups 
C)  the need to add new species of fish that can become commercially viable 
D)  eliminating undesirable fish species that are competing with desirable species