請依下文回答第 11 題至第 15 題：
        Otters are carnivorous mustelids in the Lutrinae subfamily. There are 13 __11__ species of otters aroundthe world, one of which is native to the UK. But now let’s focus on two species in other areas. One is theEurasian otter. This species is the most widely distributed of all the otters,  __12__  through Eurasia upto the Arctic Circle, from Ireland to Kamchatka, and south to North Africa, Sri Lanka and Indonesia. Theirvaried and  __13__  diets mean they may inhabit any unpolluted body of fresh water, including lakes, streams,rivers, and ponds, as long as there are adequate food supplies. The other is the Sea otter. It is found most oftenin areas with protection from the most severe ocean winds, such as rocky coastlines, thick kelp forests, andbarrier reefs. Sea otters are native to the coasts of the northern and eastern North Pacific Ocean. Currentlystable  __14__  exist in parts of the Russian east coast, Alaska, British Columbia, Washington, and California,with reports of recolonisations in Mexico and Japan.  __15__  they typically forage alone, sea otters tend torest together and link arms in single-sex groups called rafts. A raft typically contains 10 to 100 animals, but thelargest raft ever seen contained over 2000 sea otters.
【題組】11
(A) extinct
(B) instant
(C) insistent
(D) extant