Final answer:
Without specific information regarding the number of candy bars sold and the total amounts raised, we cannot definitively select the system of equations that could be used to find the cost of each bar for Andy and Jason's fundraiser.
Step-by-step explanation:
To determine which system of equations could be used to solve for the cost of each candy bar that Andy and Jason are selling for a school fundraiser, we need two equations that will allow us to solve for two variables: x (the cost of one type of candy bar) and y (the cost of the other type of candy bar). Unfortunately, the question doesn't provide enough context or specific information to definitively choose the correct system of equations from the options provided. Typically, such a system is derived from knowing the total number of bars sold and the total amount raised from selling these bars. For example, if Andy sold 15 bars at x dollars each and Jason sold 22 bars at y dollars each to make a total of $85, the first equation would be 15x + 22y = 85. If they then sold a different number of bars for a different total amount, that would give the second equation needed to solve the system. Neither of these scenarios are detailed in the question, so we'd need more information to provide a definitive answer.