Which of the Following Statements Is True If Substantial Performance

Which of the following statements is true if substantial performance is proved?

A) The plaintiff must pay the defendant as agreed to in the contract.
B) The plaintiff cannot refuse to pay the defendant.
C) The plaintiff is entitled to recover the original price that had been agreed upon before the defendant performed.
D) The plaintiff is entitled to recover the new price found by taking the median between the plaintiff's demand for recovery and the defendant's claim of the amount of recovery.