The adverb clause in this sentence is 'before class starts', and it modifies 'meet', so A is the correct answer.
The class of '09 held its graduation ceremony at 7 o'clock
Believe in yourself. Know your rights. Decide what you want, Get the facts. Planning strategy. Gather support. Target efforts. Express yourself clearly. Assert yourself clearly. Be firm and persistent. Here's a list of 10 examples.
The second one is grammatically correct
