请选择ABCD5Y5}.a7R,r5F Which is smaller，the sun _________ the moon?9C5}8h+x'u6F:s2E8k1t-q/_.o8?
A．so9C5}8h+x'u6F:s2E8k1t-q/_.o8?
B．but9C5}8h+x'u6F:s2E8k1t-q/_.o8?
C．or9C5}8h+x'u6F:s2E8k1t-q/_.o8?
D．and9C5}8h+x'u6F:s2E8k1t-q/_.o8?