The following questions present a sentence, part of which or all of which is underlined. Beneath the sentence, you will find five ways of phrasing the underlined part. The first of these repeats the original; the other four are different. If you think the original is best, choose the first answer; otherwise choose one of the others.
　　These questions test correctness and effectiveness of expression. In choosing your answer, follow the requirements of standard written English; that is, pay attention to grammar, choice of words, and sentence construction. Choose the answer that produces the most effective sentence; this answer should be clear and exact, without awkwardness, ambiguity, redundancy or grammatical error.  

The tremendous insight of Einstein was that the passage of time does not appear the same while standing still as it does to a person traveling at a substantial portion of the speed of light.

A council of ecologists in Hawaii have concluded that much of the currently uncontrolled invasive species on the island chain were arriving in the holds of cargo ships.

During the bronze sculpture boom of the late 1950s, more than 20 tons of bronze were shipped to the SoHo district of Manhattan so as they might sculpt countless bronze statues, busts, abstract shapes, and whimsical figurines.

Product marketing jobs at MegaCorp are difficult to fill because they require specialized skills, demand great responsibility, but also barely any vacation time.

Having accounted for only 13 percent of the student body at Northlake Highstudents who attended Megalopolis Middle School dominate the Northlake High student government.