Answer:
a) reactions to the comedy skit.
Explanation:
The independent variable is what researchers are observing, it is called independent because researchers do not know how it will react to the conditions it is exposed, in this case, the comedy skit after a regular night’s sleep and after a sleepless night.
Answers b and c have nothing to do with the current experiment.
Answer d could be right but sense of humour will be the final conclusion of the study. First, researchers will observe students´reactions (independent variable) which will lead to a more general conclusion; sense of humor affected by the amount of sleep.
The 4th Amendment says that the you're secure in your home and it stops people from entering your home without your permission and stuff like that so yes that's true.
The twisted magnetic field of the Sun traps plasma inside its arch. When the magnetic arch eventually breaks because of so much twisting, the plasma trapped inside goes flying out into space.