Marissa is a single taxpayer. On August 1, 2021, her mother gifted her a house that immediately became her principal residence. On August 1, 2022, she sold the house for a realized gain of $133,000. She did so because she received a job promotion and was transferred to a new location out of state. What is the maximum amount of gain, if any, that may be excluded under Section 121?
A)
$133,000
B)
$125,000
C)
$66,500
D)
$0