Read the text and choose the correct statement. In Japan, students often participate in 'bukatsu' or after-school clubs, which are a significant part of their school life. These clubs range from sports like baseball and kendo to cultural activities such as calligraphy and tea ceremony. Bukatsu helps students develop teamwork, discipline, and new skills, fostering a strong sense of community within the school. Which of the following is true about 'bukatsu' in Japan?
A) They are optional activities for students.