A customer received a regulation T margin call. She can meet the call by depositing into her account which of the following?

I. listed stock with a market value equal to the amount of the call

II. Cash equal to the amount of the call

III. Unlisted marginal stock with a loan value equal to the call

IV. 50% of the cash amount of the call

a. II or II only

b. II or III only

c. I, II, or III only

d. I, II, III, or IV