As U.S. nuclear attack submarines prowl their familiar haunts deep within the oceans of the world these days, they increasingly are engaged in missions far different from the tasks for which they were built and for which their crews were trained over the last forty years.

A. they increasingly are engaged in missions far different from the tasks for which they were built

B. the missions they increasingly engage in are far different than the tasks they were built for

C. they engage increasingly in missions that differ significantly from the tasks they were built for

D. the missions they engage in are increasingly different than the tasks for which they were built

E. they increasingly engage in missions far different than the tasks for which they were built


The correct answer is A. It is the correct answer. As far as I know this is an OG question...

I would help in clearing your doubt on the option C.

Option C is not parallel. Both of them us the correct idiom 'different from' but the option A is parallel.

see the non-underlined part as well 'for which' is used and the used of 'and' as a coordinator in between.

Hence the correct answer is A.

Also option C uses a wrong tense. It somewhere changes the meaning of the sentence.

the actual meaning of the sentence is that the submarines are currently engaged in the tasks different from what they were built for.

option A conveys that the submarines always used to engage in tasks different from what it was made for.

I hope I have cleared your doubt.

In case of any further assistance, you could always PM me.

thanks for the expln.. have another doubt

how to see A and C from the point of elimination by seeing the way the sentence begins ?

A) they increasingly are engaged

C) they engage increasingly

in most of the SC questions i tumble here itself.