Researchers Found a Relationship Between Insults and Aggressive Behavior for 5-Year

Researchers found a relationship between insults and aggressive behavior for 5-year olds.If they want to test the external validity of the conceptual relationship between insults and aggressive behavior for a sample of 35-year olds,they should

A) use age-appropriate insults and measures of aggression for the 35-year olds.
B) use the same measure of aggression as was used with the 5-year olds.
C) test the findings in the real world rather than in a laboratory setting.
D) use the same insults as was used with the 5-year olds.