I think that this is a very good opening paragraph. I can clearly tell exactly what your writing piece will be about, and it definitely hooks me in as a reader... GOOD JOB!
B is correct, "<span> Christina and I went to the same summer camp for years (since we were 8)" </span>parentheses are used when you have some extra information you want to add, but its not completely necessary. Like how they started going to the same summer camp when they were 8, you can still read the sentence fine without it, but it's a nice piece of information.
<span>Media keeps us informed on almost about anything.
Its good side is that it helps us solicit ideas on how to improve the beliefs on
things. Its bad side is that when we do not understand the information
thoroughly and we feel introjected following it or we follow it with our biases
and prejudices.</span>