Answer: Earnie wins, as the modification was due to unforeseen difficulties
Step-by-step explanation:
Based on the information given in the question, since Earnie wasn't aware of the fact that the soil was rocky and later got to know after the work has commenced, if Earnie sues, Earnie will win because the modification that is made is due to unforeseen difficulties.
It should be noted that there should be a consideration for an unforeseen difficulty which comes into place after a contract has been made. Unforseen difficulties are a catalyst for further promise.