Subordinating conjunction
This question refers to the story Rules of The Game by Amy Tan.
Answer:
Winston and Vincent stop playing chess with Waverly because she has beaten them countless times.
Explanation:
Vincent and Winston are both Waverly's brothers. In fact, they are the ones who teach her to play chess. But there comes a time when "the student surpasses the teacher" and Waverly begins to win all the games against her brothers.
This results in her brothers getting bored of playing with her, since they cannot beat her and decide to change the game.
C. How long does it take to travel from the Earth to the moon?
This is the weakest research question because it can be easily answered. According to a 2 second Google search, it takes about 3 days for a spacecraft to reach the moon from Earth. This question does not allow for a lot of research for development into an essay. Options A, B and D all have a variety of possibilities that would allow for a multi-paragraph essay with significant topic development.
The correct answer is "Slang displays a tone that is too casual"
Slang speak is highly informal, sometimes even offensive. One should never use slang in a business setting because business deals should be kept highly informal and professional. Slang shouldn't be used under any circumstance as it may insult the people with whom we are talking by making it seem that we don't appreciate them or their business endeavors.