A video designer launches a new game and allows subscribers a free trial if they provide a product review of the game. Identify the type of bias that this survey suffers from

Question

Option #1 Under coverage bias because only subscribers provide a product review. Non-subscribwrs are not included.
Option #2 Voluntary response bias because the participants are self-selected

Answer 1

Option #2 Voluntary response bias because the participants are self-selected.