Answer:
B. 3
Step-by-step explanation:
The Cartesian plane consists of two perpendicular lines called x-axis and y-axis which, together with the intersection point (the origin), define a two-dimensional coordinate system that makes it possible to specify the location of points in the plane. Following this same line of reasoning, to describe the location of a point in space we need to introduce a third dimension into the two-dimensional system. For this, from the Cartesian plane, we define a z axis (perpendicular to both axes) passing through the origin which, together with the x axis and y axis will constitute our three-dimensional coordinate system.
Accordingly we can say that two perpendicular lines can represent a three-dimensional coordinate system.