单选题 The author implies that birds ______.

A、 move faster and have greater endurance than reptiles
B、 move slower and have less endurance than reptiles
C、 move faster and have greater endurance than dinosaurs
D、 move slower and have less endurance than dinosaurs

【正确答案】 A

【答案解析】根据第三段最后一句话“Birds and mammals，because they are warm blooded，move more swiftly and have greater physical endurance than reptiles，”鸟类和哺乳动物是恒温的，所以与爬行动物相比，它们移动的速度更敏捷，同时身体的忍耐力更强。只有A符合文中说法。