Which would most likely result in a long-term injury?
jumping off wall
swimming in designated areas
playing in a controlled environment
wearing a new helmet when bicycle riding

Me with this i need to get the answer quickly.

There is only one copy machine at your office. you have to make 1000 copies of an expense report. after you begin copying, two other employees show up in the copy room. each has to make only 10 copies each. what is the proper etiquette in this situation?

During the first month of development, how many layers of cells make up the embryo? a. 1 b. 2 c. 3 d. 4