We also prepared for the test by studying the driver's booklet, memorizing rules, and to learn road signs.

What correction should be made to this sentence?
1) change prepared to prepare
2) change studying to study
3) change driver's to driver
4) remove the comma after booklet
5) change to learn to learning

I think its 5, is that correct?

You are correct! :)

No, the correction that should be made to the sentence is to change "to learn" to "learning." The correct sentence would be: "We also prepared for the test by studying the driver's booklet, memorizing rules, and learning road signs."

Yes, your answer is correct. The correction that should be made to the sentence is to change "to learn" to "learning." So, the corrected sentence would be: "We also prepared for the test by studying the driver's booklet, memorizing rules, and learning road signs." This change ensures consistency in verb tense, as the other actions (studying and memorizing) are in the present participle form (-ing).