The right answer is c. The specific chapter consulted.
Explanation:
1. I was able to create a functioning rocket, it took a bit of time to understand how to in the beginning.
2. "Next, use the sharpened end of your pencil to twist the top of the body tube into a nose cone. Be sure that the nose cone is completely closed." This section was slightly hard to understand when following the instructions.
3. The author could have added pictures in the instructions for those who prefer visual representations when following directions.
^ My answer
I hope this helps. I see it was a week ago so sorry there wasn't an answer in time.
Do not use contractions. Contractions are the words formed from two abbreviated words, such as "don't", "can't" and "won't".
Do not use colloquial vocabulary.
Avoid using run-on expressions.
Do not use rhetorical questions.
Place adverbs within the verb.