Mr. and Mrs. Thomas have sat in the middle of the same pew at their church for 20 years

One day they are later than usual entering the church when they spy a new couple seated in their spot. They stand at the end of the pew until the new couple scoots down to the end of the pew. Mr. and Mrs. Thomas are exhibiting
a. an avoidance of situational crowding.
b. space psychology.
c. the density effect.
d. territorial behavior.

ANSWER: d