Is “No cell phones are allowed” a phrase or a clause?

"No cell phones are allowed" is usually used as a phrase. Most people or places don't allow cell phones to be used. So when most people try to use their phones they will most likely hear the phrase "No cell phones are allowed". So i'd say it's a phrase.

Explanation:

I hope it's correct..

its d because i know

different routes can lead to sammy to different places, with different roads.   if you check a map, you can see the routes.   try to make connections of the places and count how many there are.   hope this : )