While limiting myself to why C is not correct
I have no reason to doubt the ‘they’ has no referent. It does have. i.e. ‘
features’; so C can not be faulted on that count. The problem is more with the tense
The first part of the sub clause introduced by which, has ‘
are’ as its verb, a simple present, while the second part introduced by ‘that’ has
‘have constituted’ as its verb, a present perfect, which in my opinion is structurally unparallel. Second, logically when we pronounce something as ‘has/have constituted’ we intend to mean that something has been started in the past, it has continued until the present and plausibly may continue for some more time, but can not say whether it will continue for a long time. But the text seeks to say that the features will continue to be unrealistic for quite some time to come, and hence the proper verb to describe such a phenomenon should be a present tense. Hence ‘they have constituted’ in C is the culprit
_________________
” I truly believe in online learning, I have been a student in both an Ivy League school (brick and mortar) and in an online setting and I have learned 1,000 times more in an online setting. You do not have anyone there lecturing you and then you do the work, online you are made to do it all yourself. Amazing how different the results are. - Heather(a student)”
Alicia Helle, an online student at the UW, "Obtaining my degree online has been a blessing. With two small children, I am able to work when it is convenient for my family and me. I have nothing but positive comments and experiences from my time at UW-Stout.”
Find out what's new at GMAT Club - latest features and updates
close
