Evie wants her sister's cell phone. Her sister wants Evie's television. They come to an agreement that they will exchange these items of value. How would an economist BEST describe this scenario?

О А.

Both girls are offering a consideration.

OB.

Both girls are giving each other power of attorney.

Both girls are agreeing to create a living will.

Ос.

OD

Both girls are rejecting a concurrence of wills.