To deal with this explosion of data, one can use the computer and comm

To deal with this explosion of data, one can use the computer and communications technology to help us sort, store, transport, and most important, understand the information.

A. to help us sort, store, transport, and most important, understand the information.
B. to help us sort, store, transport, and most important, to understand the information
C. to help us to sort, store, transport, and most important, understand the information.
D. to help one to sort, store, transport, and most important, understand the information.
E. to help one sort, store, transport, and most important, understand the information.

The expression 'one can use'…requires ' help one', not 'us'. Therefore, A, B, and C are out. Between D and E, 'help' is a kind of verb that does not require the infinitive marker 'to'. E is more idiomatic than D.
E is the answer

To deal with this explosion of data, one can use the computer and communications technology to help us sort, store, transport, and most important, understand the information.

Rewriting the sentence to understand the meaning:

One can use the computer and communications technology to help us sort, store, transport, and most important, understand the information, so that he/she is able to deal with the explosion of data.

'Us' is not parallel to 'One' hence A,B and C can be eliminated. 'D' uses infinitive twice which makes it redundant. Eliminate.

A. to help us sort, store, transport, and most important, understand the information.
B. to help us sort, store, transport, and most important, to understand the information
C. to help us to sort, store, transport, and most important, understand the information.
D. to help one to sort, store, transport, and most important, understand the information.
E. to help one sort, store, transport, and most important, understand the information.

IMO Answer E.

MEANING: to deal with data, ONE can use technology to help ONE sort, store, trans, and understand; the pronoun "ONE" must be parallel, as well as, the following list "sort, store…".

Answer (E)

Imo. D.

To deal with this explosion of data, one can use the computer and communications technology to help us sort, store, transport, and most important, understand the information.

A. to help us sort, store, transport, and most important, understand the information. - one can use X and Y to help one...., pronoun shift: not one to us)
B. to help us sort, store, transport, and most important, to understand the information - pronoun shift: ...one to one (not one to us)
C. to help us to sort, store, transport, and most important, understand the information. - pronoun shift: ...one to one (not one to us)
D. to help one to sort, store, transport, and most important, understand the information. - Maintains parallelism and no pronoun error. Correct.
E. to help one sort, store, transport, and most important, understand the information. - one can use X and Y to help one to do A, B, C and D..... . Incorrect.

Official Explanation

Correct Answer: E

The plural pronoun us was incorrect because it has the same referent as the pronoun one earlier in the sentence.