Final answer:
c. In a community property state, the surviving spouse's basis in the property is adjusted to the fair market value at the date of death.
Step-by-step explanation:
In a community property state, when one spouse dies and leaves property to the surviving spouse, the surviving spouse's basis in the property is typically adjusted to the fair market value of the property at the date of death. In this case, Ed and Cheryl own land jointly with a basis of $300,000 and the fair market value of the land is $500,000 at the time of Ed's death.
Therefore, Cheryl's basis in the land would be $500,000, option C.