Which of these choices displays proper use of parallel structure and commas?
a) our teacher informed us that we needed to study, that we needed to be vigilant about grades, and to take our work seriously.

b) our teacher informed us to study more, that we needed to be vigilant about grades, and that we needed to take our work seriously.

c) our teacher informed us that we needed to study, that we needed to be vigilant about grades, and that we needed to take our work seriously.

d) our teacher informed us, that we needed to study, that we needed to be vigilant about grades, and that we needed to take our work seriously.

  plan: i will begin with a quotation about the importance of unity in a community. then, i will state my claim that an activity will unite our school by creating a shared vision, purpose, and direction. in the body, i will use three main points that describe the different avenues the students can take: through a variety of clubs, through a special event, or through an awareness week. i will provide evidence about other towns that have unity activities and the kinds of events that they include. pictures will illustrate my three main points in action. for the ending, i will restate the main idea in a new way and pose a question to keep the audience thinking. 

answer: idk thats why im on here

explanation:

i will have to go with 1.

hope this !

what excerpt? i would generally think a.