The problem with a simple-comparison design is that A) it does ...

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The problem with a simple-comparison design is that
 
  A) it does not fully control for the influence of other variables.
  B) it is insufficient for demonstrating a clear functional relationship.
  C) the independent variable cannot be manipulated.
  D) Both a and b are correct.

Question 2

Murielle has been feeling a lot better these past few weeks after she started avoiding caffeine. The procedure that Murielle has used to test the effects of caffeine is most similar to the _____ design, which is _____ for drawing firm conclusions about the effects of caffeine.
 
  A) simple-comparison; inadequate
  B) reversal; inadequate
  C) multiple-baseline; excellent
  D) simple-comparison; excellent

[Perkypinki]

Answer to Question 1

D

Answer to Question 2

A

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Thanks for the timely response, appreciate it

[sultansheikh]

Wow, this really help