A Researcher Studies the Effects of Gender by Comparing People's

Multiple Choice

A researcher studies the effects of gender by comparing people's experiences before undergoing sex changes and then again after their sex changes (e.g.,like the Donald to Deirdre case) .The researcher uses a statistical technique called individual fixed effects,which involves:

A) comparing outcomes to determine cause and effect.
B) comparing an outcome across space,in two different places.
C) comparing an outcome across time without altering any factors.
D) comparing an outcome across time as some factor changes.