[单选题]
How does meiosis pro c n/u/j0(o,sycwiwh*rhxa 1.bzk)iya7nm *- pwm*t +7ic-o)gyh8abmote variation?
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