The research is so ———-that it leaves no part of the issue unexamined.A. Comprehensive B. RewardingC. SporadicD. Economical 0 0 votesArticle Rating Subscribe LoginNotify of new follow-up commentsnew replies to my comments Label {} [+] Name* Email* Website Label {} [+] Name* Email* Website 0 Comments Oldest Newest Most Voted Inline FeedbacksView all comments