Answer:
The correct answer concerning a subordinate conjunction is letter b. The concert attendees roared their approval while the band played a new song.
Explanation:
Letter A can be eliminated. It joins the sentences only with a semicolon, without any conjunctions.
Letter C does use a comma and a conjunction, "so". However, "so" functions as a coordinating conjunction, not as a subordinating one.
The same goes for letter D. We have a comma and a coordinating conjunction, "and". There is actually an easy acronym to help memorize the coordinating conjunctions: FANBOYS (for, and, not, but, or, yet, so).
The only correct option is letter B. The subordinating conjunction "while" is used to establish a relationship concerning time between the two sentences. Its purpose is to show that both actions took place simultaneously.
I believe that cell phones are a source of cheating, they are now just like have a Minnie computer in your hand. You have full access to the internet where you can find the answer to any questions or problem. Without even putting fourth any work or actual using your mind to learn anything.
When odysseus said "my name is nohbdy; mother, father, and friends, everyone calls me nohbdy."