Answer:
B, appeal to ignorance
Explanation:
The author is concluding that since no concrete proof of aliens exists. aliens themselves cannot exist. However, a lack of evidence is not proof of NO evidence
It's useful because it gets you ahead in class. If you read ahead you are more likely to understand what your professor is teaching. It also helps if you unexpectedly get a large amount of homework. If you have read ahead it allows you to have more time doing labs or essays.
A preposition and to end with an object
Como se dices caca en ingles es {poop}
