TOEFL Reading: ETS-TOEFL阅读机经 - K7WY073PJ15NCIU5L$

According to paragraph 6, which of the following is true about habitat selection by the blue tit? A. It selects a habitat having the tallest trees. B. It selects a habitat where there are no caterpillars to eat the leaves. C. It selects its territory each year in spring. D. It selects its habitat before its preferred food appears in the area.