How does the boyce and perrins model differ from the lack model for explaining optimal clutch size?

This question had choices. Here are the missing choices.

The Boyce and Perrins model accounts for year-to-year predictability in food supply and variation in survival rates.

The Boyce and Perrins model assumes that there are specific parental traits that affect offspring survival probabilities.

The Boyce and Perrins model suggests that average clutch size should be the maximum possible clutch size in a good year.

The Boyce and Perrins model accounts for the increasing day length as the spring progresses toward summer each year.

My answer:

The Boyce and Perrins model accounts for year-to-year predictability in food supply and variation in survival rates.