A sequence: [small circle on the left of a horizontal line] → [small circle in the middle of the line] → [small circle on the right of the line] → [small circle below the right end] → [?]. What comes next?
-
A
Small circle moving left below the line
-
B
Small circle above the line on the right
-
C
Small circle back to the left
-
D
Small circle in the center below the line