As we now enter an era of broadband communication,
most analysts agree that no less than a new breakthrough is necessary to meet the need for higher data storage capacity and faster data transfer rate.
A. that no less than a new breakthrough is necessary
I believe no less than is not a correct usage. no less than refers to a number or amount -
like - She has had no less than a dozen job offers.
B. that nothing other than a new breakthrough is needed
Not sure what is wrong here.
Looks correct to menothing other than - means it refers to a course of action, decision that is only possible in the current situation.
C. that a new breakthrough is necessary
Looks correct to meD. the necessity for a new breakthrough
Looks correct to me, not sure what is wrong here.
E. the necessity for a new breakthrough occurring
occuring does not go along with to.