Two Frog Populations (Same Species)living in Two Neighboring Lakes Sing

Two frog populations (same species) living in two neighboring lakes sing slightly different courtship songs.Increased irrigation makes the land between the two lakes wetter,allowing frogs to expand their ranges to the area between the lakes.Females in both populations prefer loud frogs to quieter frogs,but do not distinguish between the two slightly different songs.Assuming that courtship song differences have a genetic basis,predict what will likely happen to the songs of the two frog populations.

A) The songs become more similar to each other.
B) Males will become louder.
C) Disruptive selection will cause the songs to differentiate even more.
D) Genetic drift will cause the songs to differentiate even more.
E) You cannot predict a change in the courtship songs at the two lakes.

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