Word meaning cooperative

Which of these sentences has an error in subject-verb agreement? a. official procedures calls for students who are tardy three times to serve detention. b. as a result of her efforts, a team of volunteers signs up every month to clean the city's parks. c. the committee of parents protested loudly at the school board meeting. d. each of the neighbors brings a dish to share at the pot-luck gathering.

Choose the option that includes the main claim in “the american promise”

Pls pls pls i will give u brainliest in the story open window, what is the significance of the open window?