Answer: It perpetuates the two-party system because minor parties do not attract a wide enough range of supporters to win.
Explanation:
The United States may be a democracy but it is one that is run by two parties. Minor parties do not have the reach, support or financing to challenge the great Republican and Democratic parties which is why in other to get enough votes to get into the major offices, one simply must belong to one of the two parties.
This is what the scenario above depicts. The plurality system assigs electoral votes to the candidate with the highest vote in the state and with the Reds and the Blues having support too wide to surmount, the system favors them and perpetuates their dominance.
The answer to this question is true
The variable is the group that was given caffine, because thats what the doctors manipulated. They possibly altered the natural memory of the participants by giving them caffine. A more specific variable could be how much caffine each participant is given and what time are they given it.