GRE Text Completion: JiJing 1373-GRE填空机经1373题 - 5J30ATPFPWPJ0I4QA

The laboratory maze has grown ever less ____________ since it was first invented; instead of hoping to lose a rodent in a labyrinth, today's scientists design mazes to elicit a few simple, easily measured behaviors. A. intricate B. extensive C. effective D. convoluted E. useful F. prevalent