Please explain why E is wrong . i chose E.

is it wrong because there is no parallel structure on both sides of after
or it is worng because of use of 'with'

hello Somebody in above posts mentioned the reason for rejecting choice D is that 'which' seems to modify date instead of the act of congress... if this is correct if am really getting confused with use of which directly after comma... I know few rules for use of which after comma. 1) it should unam...

I agree with all your explainations above regarding parallelism around and... but if i closely look at choice e there is 'and' too and this 'and' parallels all the reasons such as erosion, pre-historic glacier movement and Z Z here is volcanic activity... but the way it is presented totally confuses...

[deleted -- OG problem]

OG problems are not allowed here; please familiarize yourself with the forum rules before posting.

thanks.