Maximize Conversion can be described in which of the following ways?
1) Maximize Conversions uses machine learning to capture as many conversions as possible within a daily budget.
2) Maximize Conversions automatically limits conversions that don't align with a desired bidding strategy.
3) Maximize Conversions is the safest bidding strategy for all business types to optimize their bidding.
4) Maximize Conversions aims to achieve an average return on ad spend (ROAS) equal to a desired target.