If I Grant My Grandma a Life Estate and She

If I grant my grandma a life estate and she asks about her rights and duties as a life tenant, which of the following is true?

A) If I make no indication of who the property is to go to when she dies, the property reverts back to my estate.
B) The life tenant is not responsible to make repairs to keep the property in good condition, only the fee simple owner has that responsibility.
C) The life tenant after 20 years, can establish a easement interest in the property.
D) The life tenant can transfer the fee simple to someone in her will.
E) The life tenant cannot rent out the property during the life tenancy.