Lessee leased some land and buildings from Lessor. There was no transfer of ownership and no bargain purchase option. If the fair value of the land is less than a certain percentage of the total fair value of the leased property at the inception of the lease, both the lessee and the lessor may consider the land and buildings as a single unit. What is that percentage?

a.10%

b.75%

c.50%

d.25%