Multiple choice question. Please give the explanation too.

Question: Ground Leases _________

a. are not permitted in CMBS transactions

b. are always higher risk to equity investors

c. may give the ground Lessor control of all of the real estate improvements in a credit default scenario

d. The risks to the lessee is most affected by duration, escalations, and options associated with the ground lease

e. all of the above

f. C & D