Based on Anderson and Johnson's Conclusions Regarding the Evolution of Tongue

Multiple Choice

Based on Anderson and Johnson's conclusions regarding the evolution of tongue length in long-tongued flies, which of the following would be expected?

A) A study demonstrates that in populations with shorter tongues, other nectar sources have very long nectar tubes.
B) A behavioral study demonstrates that flies in populations with shorter average tongue lengths spend more time visiting other flowers than visiting Zaluzianskya flowers.
C) A study of available flowers in the population with the longest average tongue length reveals that no other nectar sources besides Zaluzianskya are available.
D) a and c
E) b and c