LouAnn enters into a contract to sell her motorcycle to Marni. Marnie takes possession of the motorcycle when she is $16$ years old and continues to use it for five more years, well after reaching the age of majority. She has

a$.$

$$impliedly ratified the contract.

b$.$

$$expressly ratified the contract.

c$.$

$$impliedly disaffirmed the contract.

d$.$

$$expressly disaffirmed the contract.