[单选题]
The graph below shows t tof199l c8nr jeohe.-9llr, she relationship between m jj hvtf28,;poaternal age and the incidence of non-disjunction. What relationship is sjo2fth ,;pj8vuggested 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.
