单项选择题
In the xy-plane, line k is a line that does not pass through the origin.
Which of the following statements individually provide(s) sufficient additional information to determine whether the slope of line k is negative
Indicate all such statements.（）
A.The x-intercept of line k is twice the y-intercept of line k.
B.The product of the x-intercept and the y-intercept of line k is positive.
C.Line k passes through the points (a, b) and (r, s), where (a - r)(b - s) < 0.