Choose the correct ending for the statement: Yandex only considers an impression valid if…

1. the banner ad appears in the active browser window for at least 1 second.
2. at least 50% of the banner ad appears in the active browser window for at least 2 seconds.
3. at least 10% of the banner ad appears in the active browser window.

Correct Answer:

• at least 50% of the banner ad appears in the active browser window for at least 2 seconds.