I would say D. beginning, early proficient and advanced competence as it is to do with throwing so is a physical skill so can be described in these ways according to the level of proficiency or competence exhibited by the sports person.
I believe the answer is: c. initial, elementary, emerging elementary, and proficient
Initial stage refers to the period when students just experiencing education environment. Elementary and emerging elementary happen when students start to grasp the concept of new knowledge and use their intellectual ability to dive further into the topic. Proficient stage refers to the period when students able to conduct further study without many assistance from others.
You must consider if you are putting yourself in danger by assisting them and the information you should provide first is where you are located what you seen happen you should ask them if you should do anything to help ?