What Are the Advantages and Disadvantages of an Experiment

What are the advantages and disadvantages of an experiment?

A) advantage: good for gathering information about issues that are not directly observed; disadvantage: because the data were collected for another purpose, the researcher cannot control what variables were included
B) advantage: good for exploratory and descriptive study in a natural setting; disadvantage: a potential for a low response rate
C) advantage: group interaction may produce more valuable insights than individual surveys; disadvantage: research must balance roles of participant and observer
D) advantage: saves the expense and time of original data collection; disadvantage: replication of research is difficult
E) advantage: provides greatest opportunity to assess cause and effect; disadvantage: the setting may have an artificial quality about it