Answer: a. A prerequisite must be taken before another course; a corequisite and another course must be taken together.
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Explanation:
A prerequisite to calculus is precalculus since you must take precalculus before calculus. The "pre" indicates "before".
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As for corequisite, you could have a biology course and a lab that goes with it. Though usually labs are considered part of the class. It will depend on how the course is structured.
Another example of corequisite classes could be taking a statistics course focused on psychology majors and also some other psychology course dealing with sampling techniques.
The "co" means "together".
Gaius Julius Caesar, known by his nomen and cognomen Julius Caesar, was a Roman politician and military general who played a critical role in the events that led to the demise of the Roman Republic and the rise of the Roman Empire. He is also known as an author of Latin prose.
I got it from Wikipedia.
Hope it helped.
A.
It's up to you to decide what to do.
In this sentence, it's stands for a contraction for it is.
This means he/she just needs time to get their thoughts together. You're technically still "together" but need to work things out and talk to one each other.<span />
