The question above has multiple choices as follows.
a. App extensions
b. Sitelink extensions
c. Structured snippet extensions
d. RSLAs (remarketing lists for search ads)
The correct answer is (A) App extensions
App extensions are a great way for people to access your website. They allow you to link to your tablet or mobile app from your text adds. If you want to drive app downloads, app promo ads might be the best option.