Question

name four points in the diagram.
diagram showing planes s (top) and t (bottom), with points a (on t), b (on a line in s), c (on a dashed line in s), d (on a line in t), e (on a line in t)
options (with checkboxes): a, e, b, $overleftrightarrow{de}$, d, $overleftrightarrow{bc}$, plane s, plane t

Explanation:

Points are represented by single capital letters. Among the options, A, E, B, D are single - lettered representations of points. $\overleftrightarrow{DE}$, $\overleftrightarrow{BC}$ are lines and Plane S, Plane T are planes, so they are not points.

Answer:

A. A, B. E, C. B, D. D