Which sentence has proper parallel structure?
a. the proposal affects three groups: students, parents, and teachers.
b. we posted the notice whereever people meet, on the internet, and in the office.
c. we know who supports us, our opponents, and who has not yet decided.

The correct answer is A. The proposal affects three groups: students, parents, and teachers.

Explanation:

Parallel structure or parallelism occurs when in a sentence different ideas or items follow the same grammatical structure or pattern. This implies the way ideas or items related to other words in the sentence is the same or parallel. Additionally, parallelism makes texts easier to understand as it group words and relate to only one grammatical structure at once. In the case of "The proposal affects three groups: students, parents, and teachers", the first grammatical structure "The proposal affects three groups" is applied to different items "students, parents and teacher" due to this, this sentences follow a proper parallel structure considering the items in the list are related to the same structure and items are put together to express a concise idea.

citizens are given 25 years of life to prove their worth to society; if they fail to do great things

at the beginning of the story, elisa just has the small idea of wanting more attention, but as the story progressed, her desire for more attention grew larger. before she talked to the man with the wagon she was just focused on her chrysanthemums but when she talked to him and got some attention she enjoyed it, so she decided to get all dolled up for henry. but when they were on the way to dinner she was so upset because she saw the flowers on the side of the road and realized the man didn't take interest in her like she thought.