A trainer on a Project Planning Module conducts batches of soft skill training for different companies. The trainer sets the batch size (the number of participants) of any batch such that he can make groups of equal numbers without leaving out any of the participants. For a particular batch he decides that he should be able to make teams of 3 participants each, teams of 5 participants each, and teams of 6 participants each, successfully without leaving out anyone in the batch. Which one of the following best describes the batch size (number of participants) that he chooses for the program?
(A) Exactly 30 participants.
(B) At least 30 participants.
(C) Less than 30 participants.
(D) More than 30 participants.
(E) Participants in groups of 30 or its multiples.