Which of the Following Refers to the Validation Approach of Construct

Which of the following refers to the validation approach of construct validity?

A) asking parents or friends about a respondent's substance use to verify their self-reported substance use
B) a researcher asking opinions of experts or reviewing the literature to identify different aspects of a concept
C) showing that a measure on childhood abuse is related to other measures specified by theory
D) a question asking how many drinks a person has consumed in the past week to gain information on drinking patterns