Identify the diameter of circle A.

A diagram of a circle is shown.
• The center of the circle is labeled A.
• Points R and S are on opposite sides on the circle at the end points of a line segment that passes through center A.
• Point T is on the circle, slightly closer to point R than point S.
• Line segments connect center A and point T and point T and point S.

A. modifying above A R with bar
B. modifying above upper A upper S with bar
C. modifying above upper R upper S with bar
D. modifying above upper T upper S with bar

Based on the given information, we can conclude that line segment RT is a radius of the circle, and line segment AS passes through the center A and bisects RT. Therefore, line segment AS is also a diameter of the circle.

The answer is B. modifying above upper A upper S with bar.