Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct word for each of the blanks.
Voluntourism is a new form of traveling that has ___(1)_________ popularity in recent years. This term is a combination of 'volunteer' and 'tourism', which means people get involved ___(2)_________voluntary work when they travel. When volunteering overseas, tourists get the opportunity to explore new places, experience foreign cultures, ___(3)_________ learn more about people in other countries. This ___(4)_________the time spent is worthwhile, and the vacation is more ___(5)_________.