[单选题]
The graph below shows the relation3 fsa -ryn7 c0ysojo8(ship betfcrn z0 59j7dhween maternal age and the incidence of non-disjunction. What relationship is su0 zj c9hr75dnfggested by the data in the graph?
A. There is a positive correlation between age and incidence of non-disjunction.
B. There is a negative correlation between age and incidence of non-disjunction.
C. There is no correlation between age and incidence of non-disjunction.
D. Non-disjunction only happens when maternal age is above 35.
