Beethoven’s String Quartet in C-sharp Minor, music history homework help

Beethoven’s String Quartet in C-sharp Minor (NAWM 127) is among his last works, composed during his third period when his output was often emotionally tormented.  Mozart’s String Quartet in D minor (K. 421) also stands out because of its tragic mood. Watch and listen to a performance of the first movement of Mozart’s work here: http://youtu.be/fLmuVEty_SA.   

Your discussion assignment is to identify at least five (5) elements in the Mozart excerpt that reflect characteristics of the music of the Classical period as compared to those same elements in Beethoven’s music but reflecting characteristics of the music of the Romantic period. Then respond to the postings from two of your classmates, disagreeing or amplifying views presented by them.