I believe that the general notation for your subtopics in an outline is B. capital letters.
Roman letters are used for topics, capital letters for subtopics, and the rest for supporting points.
May I see the following answers?
Thinking that the bold word would be "grew" i think it would be C.helping
Answer:
The answer is "I opened "Stars and Space" a book about NASA and read the first chapter, which was titled "An Introduction to the Planets."
Explanation: