The correct answer is b.
Hardly, as an adverb means "just", hardly, in this context is acting as a limiting modifier of the word ever. <em>Hardly ever</em> means very occasionally. We may use words like it to emphasize how infrequently an action takes place. You should note also that there could be other ways to give quite the same meaning, like when you use <em>rarely</em> or <em>seldom</em>, but, hardly ever has also a <u>negative</u> connotation.
The correct answer would be
D) According to Scholastic Book Records 2011, soccer player Lionel Messi makes over $39 million dollars annually. This impressive salary is from his work as a striker for La Liga's Barcelona team (page 99).
This is correct because it leaves your point of view out, it has correct grammar, and it gives you the source.
Drawling logical conclusions
Tell her it's not the teacher's fault that you didn't study and get a good grade. Don't blame the teacher for your mistakes.
The best answer to complete this sentence would be the third option aka C) Theme of equal rights.