As U.S. nuclear attack submarines prowltheir familiar haunts deep within the oceans of the world these days, theyincreasingly are engaged in missions far different from the tasks for whichthey were built and for which their crews were trained over the last fortyyears. (A) theyincreasingly are engaged in missions far different from the tasks for whichthey were built (B) the missionsthey increasingly engage in are far different than the tasks they were builtfor (C) they engageincreasingly in missions that differ significantly from the tasks they were builtfor (D) the missionsthey engage in are increasingly different than the tasks for which they werebuilt(A) (E) theyincreasingly engage in missions far different than the tasks for which theywere built