A man owned a property before he married his wife. The married couple lived in the house for two years and are now in the process of selling it. Which of the following statements regarding the wife's signature on the sales contract is TRUE?

a. The wife is not an owner, so her signature is prohibited.

b. The wife is required by law to sign the sale contract.

c. The wife should sigh the contract to avoid any future problems regarding spousal interest.

d. The wife will need to sign a quitclaim deed releasing her interest in the property.