<span>prove his point by spelling out the options available with an education.
In his parallelism, he is showing that you'll realize your potential or interests in school while doing a project or writing an essay. The last part of the parallelism speaks about classes, so we know that his emphasis is on education. This eliminates the first and last options. He isn't necessarily choosing the best classes here, just using English and science as an example. This leaves the third option as the correct choice.
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"I need to gather all these relevant information about this assignment.”
“I can do this assignment by myself. I don’t need to work with anyone else.”
"I need a detailed plan in order to complete this assignment."
“I’ll brainstorm how to do this assignment and then just jump and begin with whatever part interests me most.”
The last sentence certainly sums up the rest of the contents. I think you ought to choose the second answer.