Max is unmarried and files single. Max sold his principal residence during the current year for a gain of $400,000. Max owned the house and used it exclusively as his main home for the last 10 years owning no other homes during this period. What is the maximum exclusion Max can claim on his gain?

Group of answer choices

$0 exclusion.

$250,000 exclusion.

$400,000 exclusion.

$500,000 exclusion.