Ron Enters into a Contract to Paint Paul's House

Ron enters into a contract to paint Paul's house.When Paul decides on a color,Ron will buy the paint and paint the house for the price of $2,500.This contract is governed by:

A) the common law of contracts because this is a mixed contract (one for services and goods) .
B) the common law of contracts because the predominant factor of the contract is for the sale of services and not goods.
C) the Uniform Commercial Code because a sale of goods is involved.
D) both the common law and the Uniform Commercial Code.