When you see a sentence not make sense it's usually because you are leaving out important words or mixing them up in the wrong way in that sentence so due to this knowledge a dangling modifier would be C.
An independent clause and a dependent clause.
An independent clause is a clause that can stand alone as a sentence (i.e., it expresses a complete thought). However, a dependent clause (or subordinate clause) is one that cannot stand alone as a complete sentence because it does not express a complete thought. Cause it is not a complete thought, it is dependent on being attached to an independent clause to form a sentence. The link between a dependent clause and an independent clause will often be a subordinating conjunction or a relative pronoun.
Answer:
I also enjoyed how the children were treated, they were treated nicely and respectfully as full members in this video. [I also feel as if it is important for everyone to remember that children do not always understand their emotions that they are showing to others. People must remember that children don't understand how to make their feeling understandable