Joelle promises his girlfriend that he'll give her a ruby necklace on her birthday. If he does not,

Select one:

a.

She can sue him for breach of contract because he broke his promise.

b.

She can sue him based on quasi contract because she was unjustly enriched.

c.

She cannot sue him for breach of contract because she did not rely on his promise.

d.

She cannot sue him for breach of contract because she did not offer consideration in exchange for the necklace.