The first step in the creation of the LASIK surgery techniqu

[BTGmoderatorDC]

The first step in the creation of the LASIK surgery technique (laser-assisted in siku keratomileusis) was taken in Spain in the 1950s by Dr. Jose Barraquer, who developed them as an alternative to wearing eyeglasses or contact lenses.

A. in Spain in the 1950s by Dr. Jose Barraquer, who developed them as an alternative to wearing eyeglasses or
B. in Spain in the 1950s by Dr. Jose Barraquer, who developed it as an alternative to the wearing of eyeglasses or of
C. in the 1950s in Spain by Dr. Jose Barraquer, who developed it as an alternative to wearing eyeglasses or
D. in the 1950s in Spain by Dr. Jose Barraquer, who developed them as an alternative to eyeglasses or
E. in the 1950s in Spain by Dr. Jose Barraquer and was developed as an alternative to wearing eyeglasses or

OA C

Source: Economist Gmat

[deloitte247]

Option A:- Incorrect
In the first instance, the surgery technique so developed is a singular subject i.e TECHNIQUE which does not warrant the use of the plural pronoun THEM, and that's aside the fact that the statement is a direct lifting of the question passage.

Option B:- Incorrect
Here, the author tries to over-emphasize the article the within the context of "the wearing of eye glasses" . This particular object hasn't been talked about in the time past because it's a new invention which therefore doesn't require the use of the emphatic article THE.

Option C:- correct
The LASIK surgery technique being a singular item makes the singular shape of it instead of them (plural of it). The explanation by the author is rather simple than all that's been so far considered.

Option D:- Incorrect
This is not quite different from the option A explained above. compare the noun word with the corresponding pronoun used in place of it.

Option E:- Incorrect
This is a conjunction which ordinarily means "In addition to" Here, in the context it has been used as a punctuation is necessary to break it into different parts with the later explaining directly what's stated in the earlier part.