Jenna Is a Graduate Student and Invites a Number of Her

Jenna is a graduate student and invites a number of her international friends to dinner at 8 pm. Mari, her Norwegian friend arrives a bit before 8 with a small gift for her. Kelly, the Canadian, arrives shortly after 8, apologizing for being late. Gabriela, from Argentina, arrives around 9:30 pm. Hanako never arrived even though she said she was coming. The different arrival times demonstrate

A) differing concepts of time learned by each person based on their country of origin.
B) some individuals have learned to be more polite dinner guests than other.
C) Hanako is demonstrating escape conditioning.
D) Kelly is demonstrating habituation.
E) differences in how much each person likes Jenna.