单项选择题
A. healthier lifestyle B. some human disease treatments C. some diseases D. human survival E. human genomes F. key areas
A．Female finches liked songs male finches sang for them B．Female finches only liked songs male finches sang for their mates C．Female finches liked to listen to songs from both speakers D．Female finches chose the best male singers as their mates
A．research B．experiment C．analysis D．service