[单选题]
The graph below shows the relationship between mater sd q*mznvmh 6q/)t9r9ac*e:wnal age and v 9xa2iqurp70 ,i dq7vthe incidence of non-disjunction. What relationship is suaqxrv iiq,u7 v79dp2 0ggested 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.
