The teams selected to put up their best in the competition, with excellent credentials and evidence of genuine curiosity and creativity.

【正确答案】 C

【答案解析】解析：名词辨析。credentials表：证明书，文凭；A．essentials本质，要素，基础，必需品；B．qualities品质；C．qualifications资格(证明)，合格性；D．quantities数量；因此C为答案。