Sentence Correction

There is a big difference between government agents scanning items for explosives or
looking through a suitcase full of clothing, from searching through the hard drive of a
laptop computer containing work papers, financial records, e"mail messages and Web
site visits.

A. government agents scanning items for explosives or looking through a suitcase
full of clothing, from searching through the hard drive of a laptop computer
containing work papers
B. government agents who are scanning items for explosives or looking through a
suitcase full of clothing, or searching through the hard drive of a laptop computer
containing work papers
C. government agents scanning of items for explosives or looking through a suitcase
full of clothing, and searching through the hard drive of a laptop computer which
contains work papers
D. government agents that scan items for explosives or that look through a suitcase
full of clothing, and that search through the hard drive of a laptop computer
containing work papers
E. government agents scanning items for explosives or looking through a
suitcase full of clothing, and searching through the hard drive of a laptop
computer containing work papers

5Sec scan
Difference Between X and Y ( Idiom Error Type )
Eliminate AB
Eliminate C - which is unnecessary ( As we need ,before which ; modifies something)
Eliminate D - that is not used for Human begins
Left E
However, why E is correct even though we do not have government agents 'who'?