Question

if a, b, and n are collinear and ab + bn = an, which point is between the other two points?
a
cannot tell
b
n

Explanation:

Step1: Recall collinear - point property

If three points $A$, $B$, and $N$ are collinear, and the sum of the lengths of two - line segments formed by them equals the length of the third line segment, i.e., $AB + BN=AN$, then by the segment - addition postulate, the point that is between the other two points is the point that is common to the two smaller segments.
In the equation $AB + BN = AN$, the common point between the segments $AB$ and $BN$ is $B$.

Answer:

C. B