The endowment effect
A) states that people are often willing to make themselves worse off in order to make someone else worse off.
B) states that people are often willing to make themselves worse off in order to make someone else better off.
C) is the same as compartmentalizing.
D) states that we value an item more highly if we own it than if we do not own it.

Option D

Explanation:

The endowment effect is a finding in psychology and behavioural economics that states people are more likely to hold on too an object they own rather than taking that same object which they don't own. Just like I have a pen ,a blue pen to be precise, then I saw the same pen on the floor, instead of me taking that on the floor, I decide to hold on to the one I have other than taking that which is in the floor,this is called endowment effect. Option d explains more better.

abolish

do away with

unanimous

in complete agreement

secede

separate; break free

inauguration

starting a new position with a formal ceremony.

cooperationist

people who wanted the north to cooperate with the south

surrender

to give up

volunteer

perform a service for free

draft

involuntary service in military

retreat

withdraw; move away from enemy

advisor

expert who gives advice

explanation:

i am pretty sure it is d.