Answer: c) choices A and B
Step-by-step explanation:
Formal learning is the learning process that happens to occurs in formal and organized surroundings such as classroom,organizations,online courses etc.
Informal learning is the learning which is for life-long , beyond the limitations of learning and gained from practical events of life.This learning provides successful working in the work environment.
According to the given options , informal learning is not highly present in organized and structured form and sometimes people do'nt get hint about the learning at the present stage rather realize it later. Instructor is present in formal learning to determine the path for learning in orderly way.
Thus, both the choices are correct, which makes option (c) as the correct option.