Homer and Laura Were Husband and Wife

Homer and Laura were husband and wife. At the time of Homer's death, they owned the following: land as tenants by the entirety worth $2,000,000 (purchased by Homer) and stock as equal tenants in common worth $3,000,000 (purchased by Laura) . Homer owned an insurance policy on his life (maturity value of $1,000,000) with Laura as the designated beneficiary. Homer's will passes all his property to Laura. How much marital deduction is allowed Homer's estate?

A) $2,000,000
B) $2,500,000
C) $3,500,000
D) $4,500,000