#### Answer

One plane.

#### Work Step by Step

Through any three non-collinear points lies one plane. Realizing that there are four points listed, the three points B, C, and D are collinear, thus "counting" as only two points (through any two points lies one line). So, chose any two of the three collinear points, and then point A and you have your three non-collinear points to create one plane.