which sentence uses parallel structure?

a. this sales position includes the following responsibilities: writing a weekly status
report, to communicate with clients, and managing an assistant.

b. we set these goals for our organization: to increase our presence in the news media, to find new sources of financial support, and building team loyalty.

c. during the test, you will be asked to do the following: answer multiple-choice questions, answer short-response items, and writing an essay.

d. these simple habits can you stay energetic while you study: drinking a lot of water, sitting with good posture, and taking occasional breaks to move around.