Answer:
A. U.S. District Courts:
Step-by-step explanation:
Jury trials are available in the following courts:
a. U.S. District Courts: Yes, jury trials are available in U.S. District Courts12345.
bTax Court: No, jury trials are not available in the Tax Court6789.
c. U.S. Court of Federal Claims: No, jury trials are not available in the U.S. Court of Federal Claims10111213.
So, the correct answer is a. U.S. District Courts.