Answer: Option C
Step-by-step explanation: The given case depicts exculpatory agreement hence none of the choices are correct.
In simple words, exculpatory agreement refers to the agreements in which one party to the performance is relieved from liability. Such liabilities are contingent to an event that may or may not happen in the future.
In the given case, A is free from the liability of paying fro any injuries that may occur to B in the project.
Hence we can conclude that the correct option is C.