Why are lines AC and RS skew lines? They lie in different planes and will never intersect.
They lie in the same plane but will never intersect.
They lie in different planes but will intersect if a plane
is drawn to contain both lines.
They lie in different planes and will be parallel if a
plane is drawn to contain both lines.

They lie in different planes and will never intersect.

Step-by-step explanation:

Skew lines are lines that do not intersect and that also are not parallel. For example, if we were in a 2d dimensional space, the lines should intersect or be parallel, so from this, we know that skew lines only exist in 3d or above.

And also from that, we can conclude that skew lines are lines that do not intersect and must live in different planes.

Then the correct option is the first one:

They lie in different planes and will never intersect.

the answer will be the last one