Question

an unanswered constitutional question about the judicial branch involves
○ who should approve judges and justices.
○ what \good behavior\ means, with regard to judicial terms.
○ how a supreme court is created.
○ who should appoint judges and justices.

Explanation:

To solve this, we analyze each option:

1. Option 1 (who should approve judges...): Constitutional procedures for judicial appointments/confirmations (e.g., Senate confirmation) are defined, so this is not an "unanswered" constitutional question.
2. Option 2 (what “good behavior” means...): The Constitution uses "good behavior" for judicial tenure but does not define it. This is a long - debated, unanswered constitutional question about the judicial branch.
3. Option 3 (how a Supreme Court is created): The Constitution outlines the creation/establishment of the Supreme Court (Congress can create lower courts, the Supreme Court is established by the Constitution), so this is not unanswered.
4. Option 4 (who should appoint judges...): The Constitution defines that the President appoints federal judges/justices, so this is not unanswered.

Answer:

what "good behavior" means, with regard to judicial terms.