Answer:
(c) line KP
Explanation:
You want the intersection between line KP and plane KJN, given the rectangular prism with bottom face JKPN.
Plane
The points K, J, N comprise 3 of the four corners of the bottom face of the prism shown. As such they define the plane that includes the bottom face of the prism. Point P is also in that plane, as is line KP.
The intersection of the line and the plane is line KP.
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