Well depending on the context (as some aren't always called it) it would be referred to as an acid.
Answer:
B!!!!!!!!!!!!!!!!!!!!!!++
What you wrote is great but I do want to give you some tips.
1) Do you know what Subtle means? You need to know what words mean before you write it down. Subtle - especially of a change or distinction. Here is an example - It was a subtle of gray.
Other than that the text you wrote is amazing! Good Job! I guarantee you will get an A+! Plus you so deserve an A+!!!
4 sinx / cosx * cosx
4 tanx / cosx Trig identity tanx = sinx/cosx
