Is it true or false that the United States Supreme Court has original jurisdiction to try certain cases, in addition to its having appellate jurisdiction?

Yes, I presume it’s True.

Explanation:
I don’t have a lot of experience with these questions although I did some research and found that according to the exact wording of Article III, Section 2, states: “In all Cases affecting Ambassadors, other public Ministers and Consuls, and those in which a State shall be Party, the supreme Court shall have original Jurisdiction.” This I presume means the they did have original jurisdiction? Furthermore, if I think about this logically then, would they not be in charge of certain cases that might be severe or important that they wouldn’t let others know or help in?

I presume the answer is yes although you can choose anything you assume is correct. Btw I hope I helped a bit. Good luck!