Plant species X lives in a hot, dry environment. Slowly, over hundreds of years, the climate becomes wetter. Fungi attack species X and cause the population of species X to decrease. However, plant species X could survive if the plants
(1)try to mutate quickly and synthesize new proteins
(2)are watered often and fertilized with extra nutrients
(3)can adapt to the new conditions by mating with the fungus
(4)have a few members of the population that are fungus-resistant