Answer:
caffeine — independent variable
Explanation:
Independent variable: In psychological research, the term independent variable is defined as the variable that is changing, altered, and manipulated by the experimenter or the researcher. The independent variable is responsible for affecting the dependent variable in an experiment i.e, any changes in the independent variable will cause a direct effect on the dependent variable.
In the question above, the pair that correctly identify a variable in this experiment is the caffeine — independent variable.
Answer:
C. interracial background
Explanation:
The race of one's family and background does not affect one's behavior.
Answer:
(E) allow passengers to get in and out more easily
Explanation:
Option E is correct because there is no need for and since the list is still continuous, the use of more there shows that it is a comparison with another vehicle and it is less awkward.
Option A, B and C are wrong because of the and
Answer:
Laura's lawsuit against Bolivia will most likely not prevail because of the Act of state doctrine.
Explanation:
According to this Act, a sovereign state (United States) must respect the independence of any other sovereign state (Bolivia) and, as a result, all the laws and regulations that such sovereign state sets forth. If no US dollars are allowed to enter Bolivia, US citizens traveling to such country have to change US dollars for "Bolivianos", which is the currency used in Bolivia.
In addition, a court (a US court in this case) is not entitled to hear a case where a foreign issue is involved (the fact of exchanging foreign currency). This case cannot be heard nor decided by a US court because that would interfere with the US foreign policy (with Bolivia in this case).
