I wrote a whole summary ,but it somehow got deleted, I'll just give you the answer: B.
Hmm tough one...
I would say B
We first need to identify what a superlative form of an adjective is. That is when the adjective is put in a comparison, and is done so in it's higher form. For example, take the adjective "great". The superlative form would be "greatest". That would imply that there are, including the object that the superlative adjective is describing, 3 or more things. So, you use it only when comparing 3 or more nouns.
NO! When you use the word I it reprresents an opinion, a persuausive essay is nothing but facts.
One of the main purposes of the first paragraph of a cover letter is to preview the reasons that you're a great fit for the job. Usually, the details of yourself and your experience come into the later paragraphs. The job interviewer usually wants a short, to the point paragraph about you at first before he or she jumps into the details. Hope this helps :))