Which of the following should you do when asking questions?

(3 points)
• hold the last sign
• sign a question mark at the end
• change it to a statement
• make a confused, puzzled look

The options provided are:

1. Hold the last sign.
2. Sign a question mark at the end.
3. Change it to a statement.
4. Make a confused, puzzled look.

Out of these options, the most appropriate action when asking questions is to sign a question mark at the end. The other options either do not pertain to sign language or are not effective ways to ask questions.