If all three populations were mixed together and placed at 37°C, which of the following would be most likely to happen?

AOnly the population evolved at 25°C would die and become extinct.
BOnly the population evolved at 35°C would survive and reproduce.
CAll the bacteria would die and the populations would become extinct.
DAll populations would grow, and transfer of genes would create one common population.
EIt cannot be determined from the information given.