The intention of the sentence is 'more closely integrated than before', not of 'closely integrated more than before...'

Take a simpler example:
The teammates are working more closely than ever before. - The degree of closeness is higher. 'More' adds to the degree of closeness.
The teammates are working closely more than ever before. - The frequency of working closely is higher. 'More' adds to the frequency of working together.

(E) says 'more than ever before' i.e. frequency of close integration is higher which is the not the intention.
Also, the use of 'as' is incorrect. 'Events from one part may be transmitted to another instantaneously' is not the cause but the consequence of close integration. It could also be explained as an additional but related phenomenon. Therefore, the use of 'and that' in (D) is correct.
_________________

i fyou picked E is completely horrible dude

here the options right are those that contain the word ever

Only D has the right structure: more X than ever before and THAT the phrase adds something else.

B is wrong due to SO: it seems to add something as result instead the use of that explains the situation that occurs at the same time of the first event
_________________

ok .. so we gotto use 'as' to explain the cause of something and not the consequence of something.. New learning for me. this will go into my takeaway notes
thanks a lot . .
_________________

i thought in D that modify worlds capital market that's why i crossed of D. what's wrong with my reasoning???

Hello from the GMAT Club VerbalBot!

Thanks to another GMAT Club member, I have just discovered this valuable topic, yet it had no discussion for over a year. I am now bumping it up - doing my job. I think you may find it valuable (esp those replies with Kudos).

Want to see all other topics I dig out? Follow me (click follow button on profile). You will receive a summary of all topics I bump in your profile area as well as via email.
_________________