What is one of the major benefits of Facebook Lead Ads?

Facebook will serve these ads on Pinterest in addition to Facebook.
They only serve your ads to a small group of highly qualified people.
The pre-filled form in Facebook makes it super easy for your audience to convert on—especially on mobile.
They’re optimized for a desktop audience, which is proven to convert better than mobile users.

The correct answer is:

The pre-filled form in Facebook makes it super easy for your audience to convert on—especially on mobile.