When constructing parallel lines with a compass and straightedge, how should you start the construction?

A) Measure the length of the original line and make an arc.
B) Create a line that intersects the given line with your straightedge.
C) Open the compass to the width of the line and draw two arcs.
D) Use a straightedge to create two arcs above and below the line.

I really don't have a clue