Answer:
Option: d is the correct answer
d. They are contained in multiple planes.
Explanation:
Since, the three points are collinear.
This means that there is a line which pass through these three given points and as we know that a line always lie in a plane so all the three points will be coplanar and there may be multiple planes which contain a line.
Also, a triangle is formed with the help of three non-collinear points.
Hence, the correct option is:
Option: d