GMAT Sentence Correction (SC) | RAGCT Day 11: The injury rates of seemingly dangerous

ok...this is from the MGMAT link you'd shared...

In the United States, while the number of foreign-born residents and their children is higher than ever, the percentage of the population they represent is not, in 1910 this group made up 35 percent of thepopulation when compared to 20 percent in 2000 .
A. population when compared to 20 percent in 2000
B. population as compared to 2000, when it was 20 percent
C. population, comparing it with 20 percent in 2000
D. population, unlike 2000, with