Scenario 1 a Researcher Wanted to See If Being Drunk Raises or Raises

Scenario 1
A researcher wanted to see if being drunk raises or lowers a person's self-esteem.In one condition he gives participants three glasses of punch spiked with alcohol and in the other he gives participants three glasses of plain punch.After participants finish their punch,they complete the Rosenberg (1965) self-esteem scale.
-Refer to Scenario 1.In this study,what type of variable is self-esteem?

A) a conceptual independent variable
B) a conceptual dependent variable
C) an operational independent variable
D) an operational dependent variable