3 A: Do you want to go to the zoo on Saturday?

Step 1: Analyze the question: "Do you want to go to the zoo on Saturday?" This is a direct question about willingness to go to the zoo. Step 2: Evaluate the options for a suitable response. Step 3: Option (a) "Sorry, maybe next time." is a polite way to decline the invitation for this specific Saturday.

Sorry, maybe next time.