When a population is already well adapted to its environment, what affect does increasing mutation rate from 1.0 to 10.0 have on fitness of the population? A. Fitness of this population increases overall when the mutation rate is increased
B. Fitness of this population decreases overall when the mutation rate is increased
C. Fitness of this population remains the same when the mutation rate is increased

Option D,  In this example there is not enough information to distinguish acclimation from adaptation

Explanation:

As it is clear from the explanation given in this paragraph that the leaves of  the two species have characteristic features that favors the survival of these two slope ivy species in two different environment. But it is not yet clear that whether these species have evolved or derived these characteristics through process of evolution or it is due to mating with some random species or is there any other evolutionary theory behind acquiring such traits.

No information is provided related to reproduction pattern, genetic diversity and evolution.

Hence, it will not be a good decision to conclude something based on incomplete information.