Ralph and Sven Enter into a Contract Under Which Sven

Multiple Choice

Ralph and Sven enter into a contract under which Sven agrees to guide Ralph's expedition through Tibet for which Ralph agrees to pay Sven.This contract may not be assigned if

A) the assignment will significantly change the risk of nonperformance.
B) the assignment is expressly prohibited by the terms of the contract.
C) the contract is uniquely personal in nature.
D) any of the choices.