Sue establishes an irrevocable trust to receive 100 acres of Christmas tree land worth $1 million from which she will retain an 8% annuity for her life and at her death the remaining trust principal will be donated to the American Red Cross. Which of the following most accurately depicts the type of split interest trust that Sue has likely created?

a. charitable remainder annuity trust

b. charitable lead trust

c. wealth replacement trust

d. none of the above