AmCo and BamCo from the AB General Partnership at the start of the current year with a land contribution by BamCo and a cash contribution by AmCo. BamCo contributed property is subject to a recourse mortgage assumed by by the partnership. BamCo has an 80% interest in AB's profits and losses. The land has been held by BamCo for the past 6 years as an investment. It will be used by AB as an operating asset in its parking lot business. Which of the following statements is correct?

A. Because the debt is recourse, it can only be allocated to the general partners if one of them personally guarantees the debt.

B. AB's basis in the land contributed by BamCo equals Bamco's basis in the land immediately before the contribution date, less amount of the recourse debt assumed by the partnership.

C. Immediately after formation, AmCo's basis in the partnership equals the cash AmCo contributed plus AmCo's share of the recourse debt contributed by BamCo.

D. Immediately after formation, AmCo's basis in the partnership equals the cash contributed by AmCo.