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Shopping ads on google.com:

• indicate the name of the merchant
• don’t use keywords
• all of the answers are correct
• can be served together with text ads

Correct answer is:

• all of the answers are correct

Explanation: Instead of keywords, Shopping ads use the product attributes you defined in your Merchant Center data feed to show your ads on relevant searches. More than one of your Shopping ads can appear for a given user search and, if relevant, a Shopping ad and a text ad can also appear at the same time.
Read more here: https://support.google.com/merchants/answer/2454022