27.Which of the following statements is true about accession?

Select one:

a. Accession is the intermixing of goods belonging to different owners in such a way that the goods cannot later be separated.

b. Even if a person improves personal property without the consent of its owner, he has to be reimbursed by the owner.

c. A person who mistakenly improves property in good faith assuming that he is its owner is usually entitled to recover the cost of the improvement.

d. Under accession, the owner of the original property generally doesn't become the owner of the improvements.