Take a look at the sentence again:

Ironing a clean shirt, __________, and buying a pack of gum for fresh breath were the tasks Aaron completed before the first day of spring semester.

The blank requires a gerund phrase. You chose the printout of a course schedule, which is a noun phrase with a prepositional phrase attached. You thus have a parallelism error. Before you continue, review the rules for parallel structure.

Go back to the sentence to try again.

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