New TOEFL IBT Pratice Test #006

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Listening | Question 15 of 16

Listen to an Academic Talk

What does the professor imply about host birds?

A) They often abandon their nests if a parasite is found.

B) They are not very attentive parents to their own young.

C) They are under evolutionary pressure to detect foreign eggs.

D) They have larger nests than parasitic birds.