[单选题]
How does meiosis promozd/zy-b(csw0 rl,uyab f4n;+ te variat +agh9da;aw jj:4wfyl(v(m m f/zk6c9ion?
A. Crossing over of sister chromatids
B. Independent assortment during telophase I
C. Crossing over during prophase I
D. Fusion of gametes during sexual reproduction