Display ads drive immediate conversions by retargeting shoppers and leveraging shopping signals, making them ideal for short-term sales goals in multichannel campaigns.

• Streaming TV
• Audio ads
• Display ads

The correct answer is: Display ads

Explanation: For driving short-term conversion goals using multichannel ad products, Display ads are the most effective choice. Display ads—such as Amazon Sponsored Display—target shoppers actively considering products or those who have viewed product detail pages, making it easy to retarget and convert high-intent audiences quickly both on and off Amazon.

Reference: https://advertising.amazon.com/library/guides/basics-of-success-understanding-amazon-advertising