The correct answer would be C, because you need to separate appositive/relative sentence with commas.
1. On our way to the library, we witnessed (or saw) a flock of birds flying.
2. Lying on the desk, was tom student’s paper.
Teams that communicate well are more likely to achieve their goals. A sense of belonging and stronger relationships can be formed through frequent friendly conversation. Great teams are defined by their ability to communicate effectively. Players who communicate with each other are more likely to be on the same page and to work together as a team. Respect, honor, and discipline are just a few of the virtues that can be learned through good sportsmanship.
