Need correct answer - Leaching & Innovative study

[vishal_mnq]

1) Leaching, the recovery of copper from the drainage water of mines, as a method of the

extraction of minerals, it was well established as early as the eighteenth century, but until

about 25 years ago miners did not realize that bacteria take an active part in the process.

A. as a method of the extraction of minerals, it was well established

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B. as a method of the extraction of minerals well established

C. was a well-established method of mineral extraction

D. was a well-established method of extracting mineral that was

E. had been a method of mineral extraction, well established

 

 

2) Unlike that of earlier works on slavery, Blassingame’s innovative study relies not on the

records of White slave owners but on the records of the salves themselves, especially the

70 or so autobiographies and memoirs that have been preserved.

A. that of earlier words on slavery, Blassingame’s

B. that of earlier works on slavery, Blassingame in his

C. earlier works on slavery, Blassingame in his

D. earlier works on slavery, Blassingame’s

E. the earlier works on slavery, Blassingame in his

[Roland]

Will go with C for the 1st question. OA pls?

A - article 'the' is not needed...

B - same as above

D - that was is ambigous

E - Past perfect is not needed. Also it sounds like it was a method and is no longer one.

Can you please underline the sentences that need to be corrected. Its just easier to read then Thanks..

[Rising_Sun]

1. C

2. A

[gmatnov12]

1.C

2.D

 

For 2 I think A is wrong because "Unlike that of earlier works on slavery"...should be unlike those as works is plural.

[vishal_mnq]

OA C,A

Thanks Roland for Q1

For Q2 I am confused b/w A and D

I think A can be correct only when works means authors. Can't study and works be compared