GRE Text Completion: Maggoosh-GRE填空Maggoosh - 6YY4Z7N8QKXZ5E6CY

Cryptozoology is predicted on a notion that is every bit as ____________ as the very quarry it aims to study: one cannot disproved the existence of that which does not exist. A. mysterious B. irrefutable C. cautious D. elusive E. fundamental