Answer:
A) They love to work with others and help them learn new things.
Step-by-step explanation:
When I was in school, elementary school to be exact, a lot of teachers in training found themselves practicing in my class, so they can be teachers in the near future. This means on the job training is required, especially if you are going to be in charge of the education and temporary needs of your students.
B is wrong because you don't just become a teacher right away, without the proper credentials just to earn a bachelor's degree, that's what trainings are for.
D is also wrong because, as I mentioned before, no one is just going to allow any old person around a bunch of kids to teach them, and especially if they don't have the proper certification. I should know because that's why I had to change teachers in 3rd grade because the teacher I had didn't have the proper certification to work with my type of IEP (Individual Education Plan).