SC- to lower and to dig?

[Nareshkumar j]

Q) To help preserve ancient Egyptian monuments threatened by high
water tables, a Swedish engineering firm has proposed installing
pumps, perhaps solar powered, **to lower the underground water level
and dig trenches** around the bases of the stone walls.
(A) to lower the underground water level and dig trenches
(B) to lower the underground water level and to dig trenches
(C) to lower the underground water level and digging trenches
(D) that lower the underground water level and that trenches be dug
(E) that lower the underground water level and trench digging

[shiv kumar]

hi,

Answer is D

The underline portion as a Bossy Verb propose,
Bossy Verb + That  +Subject+Bare form 'Be'

Please let me know the OA.

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[varun srichand]

Hi, 

Can you pl. explain with one more ex.

the OA for this ques??

Regards,

Varun 

[Nareshkumar j]

The OA is C!!!!

I selected option 'B' by seeing "to lower...and to dig" still don't
know how option "C" is correct.

On Dec 28, 6:54 pm, varun srichand <varun.srich...@gmail.com> wrote:
> Hi,
>
> Can you pl. explain with one more ex.
>
> the OA for this ques??
>
> Regards,
>
> Varun
>

> On Wed, Dec 28, 2011 at 10:04 AM, shiv kumar <shivkumar.c...@gmail.com>wrote:
>
>
>
>
>
>
>
> > hi,
>
> > Answer is D
>
> > The underline portion as a Bossy Verb propose,
> > Bossy Verb + That  +Subject+Bare form 'Be'
>
> > Please let me know the OA.
>

[Ajith Kannan]

I guess C maintains parallelism Installing pumps .....digging trnches

Sent from my iPhone

On Dec 30, 2011, at 11:40 AM, Nareshkumar j <j.nares...@gmail.com> wrote:

> The OA is C!!!!
>
> I selected option 'B' by seeing "to lower...and to dig" still don't
> know how option "C" is correct.
>
> On Dec 28, 6:54 pm, varun srichand <varun.srich...@gmail.com> wrote:
>> Hi,
>>
>> Can you pl. explain with one more ex.
>>
>> the OA for this ques??
>>
>> Regards,
>>
>> Varun
>>
>> On Wed, Dec 28, 2011 at 10:04 AM, shiv kumar <shivkumar.c...@gmail.com>wrote:
>>
>>
>>
>>
>>
>>
>>
>>> hi,
>>
>>> Answer is D
>>
>>> The underline portion as a Bossy Verb propose,
>>> Bossy Verb + That +Subject+Bare form 'Be'
>>
>>> Please let me know the OA.
>>
>>> On Tue, Dec 27, 2011 at 10:35 AM, Nareshkumar j <j.nareshkum...@gmail.com>wrote:
>>
>>>> Q) To help preserve ancient Egyptian monuments threatened by high

>>>> water tables, a Swedish engineering firm h as proposed installing