Sandy is standing in line for kanye west tickets. the line wraps around the block, spilling into the streets and crowding store windows. sandy is part of a(n):

a. dyad
b. triad
c. in-group
d. aggregate

D. Aggregate

Explanation:

A social group refers to individuals who interact with one another, share similar characteristics or are working together to achieve a purpose. In this case, A dyad, triad and in-group are types of social groups. Example of social groups include; family, peers, friends

However, In this case Sandy doesn't belong to a social group by definition of what a social group is.

A social aggregate refers to people who are in the same place at a point in time, but who do not necessarily have anything else in common otherwise. Example of a social aggregate are; people at a concert, people in a restaurant, people at a meetup.

From the question, we are told Sandy is in a line for Kanye West tickets, this implies that she part of an Aggregate because, she doesn't have anything else in common with the other people on the line.

this null effect is caused by a weak manipulation and ineffective internal validity. in a scientific study, as the one dr. morimoto is trying to perfom, internal validity refers to the confidence placed in the cause-effect relationship and to how well an experiment is done and able to eliminate confounding variables.        

it's the under parts of the car