Answered

A large population of cockroaches was sprayed with an insecticide. A few of the cockroaches survived and produced a population of cockroaches that was resistant to this spray. What can best be inferred from this example?
A A species will adapt no matter what the environment.
B The environment has no effect on the survival of an organism.
C Insecticides cause mutations that are passed on to the next generation.
D Individuals with favorable variations survive and reproduce.

Sagot :

Chayieegaloviz
letter D. The cockroaches that survived has the favorable ability against insecticides which they pass on their next generations. 
AnneCviz
C Insecticides cause mutations that are passed on to the next generation. 

The hint here is the second sentence. Those who survived were exposed to this kind of insecticide. and since it is in the nature of living things to mutate when adapting to situations, they reproduced next generation cockroaches that are immune to the spray.