5. Let $l _ { 1 } , l _ { 2 }$ denote two lines in space. If $\mathrm { p } : l _ { 1 } , l _ { 2 }$ are skew lines, $\mathrm { q } : l _ { 1 } , l _ { 2 }$ do not intersect, then
A. p is a sufficient condition for q, but not a necessary condition\\
B. p is a necessary condition for q, but not a sufficient condition\\
C. p is a sufficient and necessary condition for q\\
D. p is neither a sufficient condition nor a necessary condition for q