The correct response is:
The polyvinyl wrap probably caused the browning since it traps ethylene gas which would speed up the ripening process.
Explanation: When fruits like bananas are cut, they release ethylene gas, which promotes ripening. If the wrap traps this ethylene gas, it can accelerate the ripening process and cause browning. Polyvinyl wrap is known to trap gases more effectively than polyethylene, which can allow some gas exchange.