Which Alternative Correctly Pairs a Threat to the Validity of Research

Multiple Choice

Which alternative correctly pairs a threat to the validity of research with an example

A) external validity -- Dr.daSilva fails to support his results with any statistical tests.
B) internal validity -- Dr.Abdallah uses a survey to investigate the personality trait of optimism.However, the questionnaire she uses actually measures a different trait than optimism.
C) statistical conclusion validity -- Dr.Carvalho's results do not extend to participants of different cultural backgrounds.
D) construct validity -- Dr.Abdallah uses a survey to investigate the personality trait of optimism.However, the questionnaire she uses actually measures a different trait than optimism.