When considering all of the grand and newer theories, which one ...

[09madisonrousseau09]

When considering all of the grand and newer theories, which one of the following statements best summarizes their application and usefulness?
 
  All of the grand and newer theories have strengths and weaknesses. No one
  theory is applicable across all behaviors.
  While the grand theories have been proven to be useful over time, the newer
  theories require further study before we can assess their value.
  Virtually all of the theories proposed so far have been useful only to provide
  the framework for ongoing research.
  Research developmentalists are finding the newer theories to be far more
  applicable to modern-day behaviors than the grand theories.

Question 2

The process of selective adaptation continues over a period of
 
  two to three weeks.
  two to three months.
  five to ten years.
  many generations.

[CharlieArnold]

Answer to Question 1

All of the grand and newer theories have strengths and weaknesses. No one
theory is applicable across all behaviors.
While the grand theories have been proven to be useful over time, the newer
theories require further study before we can assess their value.
Virtually all of the theories proposed so far have been useful only to provide
the framework for ongoing research.
Research developmentalists are finding the newer theories to be far more
applicable to modern-day behaviors than the grand theories.

Answer to Question 2

many generations.

[09madisonrousseau09]

Excellent

[mammy1697]

Thanks for the timely response, appreciate it