The graph shows the frequency of two alleles for a genetic trait in a population.

A graph entitled "Frequency of 2 Alleles in a Population" has generation number on the horizontal axis and frequency on the vertical axis, from 0 to 1. Allele A has a 0.5 frequency at generations 1, 2, 3, and 4. It has a 0.45 frequency at generation 5. Allele a has a 0.5 frequency from generations 1 through 4 and then has a frequency of 0.55 at generation 5.

Which question is a biologist most likely to ask after seeing this graph?

A. Did the observer make the wrong observations in generation 5?
B. How many individuals were observed in each generation?
C. Is there a theory that explains the results in the graph?
D. Will the frequency of the alleles in this population change again?