GRE Reading Comprehension: OG/PP2-GRE阅读OG/PP2 - 26V8O2R4AD1O88BIP

The passage implies that during the day before a night on which a male nightingale's song rate is high, that nightingale probably does which of the following? A. Expends less of its reserves on thermoregulation than on other days B. Stores more energy as body reserves than on other days C. Hides to avoid predators