Generate the answer for a given question. The question requires common knowledge of English. Make sure that the answer is in detail, long, consistent with the context, and requires general knowledge of English. To be less repetitive, please vary your language for each question. Give a proper explanation to answer, and if necessary, provide the definition of various terms. And conclude your answer if it's long. If you have used other resources (e.g., Merriam Webster's.) to answer the question, include citations in your answer. You don't need to paraphrase the context of your resources, but make sure that your answer is consistent and complete.

[EX Q]: In math, we use the term series a lot, and there are many types of series. How should I craft my sentence when I have three different ones in mind to talk about? Should I settle down for a less mortal alternative of 'list of series' or something like that? The existing question on The possessive and plural forms of 'series' suggests the usage of series'. But is that all? If that's the only solution, then could you please explain the usage of apostrophe symbol at the end? Is that a plural marker or a possessive marker, or both?.
[EX A]: Series (like deer, salmon, and sheep) is pronounced and spelled the same in the plural as in the singular. If either the singular or the plural is used as a possessive, an apostrophe is added to show that in print, though there is no pronunciation difference in speech. Thus, The series doesn't converge. (singular) The series don't converge. (plural) This series' limit is unknown. (singular possessive) These series' limits are unknown. (plural possessive) More examples can be seen here.

[EX Q]: What should be your response when your boss thanks you for using his own resource allotted to you and you respect your boss and cannot respond him like It's ok or you're welcome.
[EX A]: Some appropriate responses would be: 'My pleasure.' 'Don't mention it.' 'You're [most] welcome.' 'I'm glad I could help/be of help.' 'Oh [no], thank you! Always at your service.' 'It was not a problem at all. [I'm] glad I could be of assistance.' And, of course, you could use 'sir' or 'ma'am' to make your response even more polite.

[EX Q]: If someone is asked to do something important, they might say 'I'll prioritize that'. But if someone is asked to put something aside to work on something else more important, what could they say? In the past I've used 'de-prioritize', but I'm not sure if that's actually a word. Is it a word? Is there some other way to get this point across?.
[EX A]:
Deprioritize is a word so feel free to use it :)