单选题 A sea pen the size of a football field awaits the whale in a isolated bay in Westman Islands.
A. included B. secluded
C. selected D. secret

【正确答案】 D
【答案解析】included：包括；secluded：隐退的；selected：选择的；secret：人迹罕见的。题中isolated“孤立的”，可知D选项符合题目要求。