Question 6 of 20 Which situation describes a pure competition market structure?
A. A government gives one company full control over water
treatment in a city
B. One company builds and sells all of the cars available in a
developing country.
C. Solar panels are only available from two companies operating in a
country
D. Many different vendors sell the same few T-shirt designs to fans at
a concert

D

Explanation:

Pure competition means *many* companies/people are going at it for the same/identical thing. C would have been a good answer if it wasn't only two companies.

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.        

d - failures.

the only attempted british colony in north america before 1600 was roanoke, virginia, which was a total failure. england claimed several areas, including newfoundland, but made no sustainable attempts to colonize them before 1600.