Gmatprep998
While many influential people such as presidents Roosevelt and Carter contributing in its development, thousands of others who are not so well known, have also worked tirelessly as volunteers to create, expand, or defend America’s national parks.
A. While many influential people such as presidents Roosevelt and Carter contributing in its development, thousands of others who are not so well known, have
B. While many influential people such as presidents Roosevelt and Carter have contributed in their development, thousands of others, not so well known, have
C. As many influential people such as presidents Roosevelt and Carter contributed in their development, thousands of not so well known
D. Many influential people such as presidents Roosevelt and Carter have contributed in their development, and thousands of others, not so well known,
E. Despite many influential people such as presidents Roosevelt and Carter contributing in their development, thousands of others, not so well known,
Source: e-GMAT Scholaranium
While many influential people such as presidents Roosevelt and Carter contributing in its development, thousands of others who are not so well known, have also worked tirelessly as volunteers to create, expand, or defend America’s national parks.
Error Analysis :While many influential people such as presidents Roosevelt and Carter contributing in its development, thousands of others who are not so well known
If we read the remaining part of the sentence , start with " have " and talk about
national parks -- which is plural ., so should be their
parallel entities :
1. many influential people such as presidents Roosevelt and Carter contributing && 2. thousands of others who are not so well known, have also worked as volunteers
So to make them parallel contributing should be made as " have contributed " and the use of who in the second sentence should be converted to direct clause .
A. While many influential people such as presidents Roosevelt and Carter
contributing in
its development, thousands of others
who are not so well known, have - wrong for the above reason
B. While many influential people such as presidents Roosevelt and Carter
have contributed in
their development, thousands of others, not so well known,
have - Correct
C. As many influential people such as presidents Roosevelt and Carter
contributed in their development, thousands of not so well known - Not parallel-Wrong
D. Many influential people such as presidents Roosevelt and Carter have contributed in their development, and thousands of others, not so well known,-Not parallel , and meaning changed as no use of while / contrast here
E. Despite many influential people such as presidents Roosevelt and Carter
contributing in their development, thousands of others, not so well known, - Not parallel -wrong