Sentence Correction – Spot the Problem

So a particular favorite student requested more practice with Sentence Correction as she works to master content for the GMAT. Since newspapers and magazine are happy to supply accidents and or bad grammar, I am happy to share.

This gem comes from the Wall Street Journal in an article on the Khmer Rouge (July 26, 2010):

After an estimated 1.7 million Cambodians die during the reign of the Khmer Rouge in the effort to turn Cambodia into a nation of agricultural collectives.

So what is wrong with that sentence?

Is it,

A. Misplaced modifier

B. Subject-Verb Agreement

C. Broken Parallelism

D. Pronoun – Antecedent Agreement

E. Other – please explain

You tell me. At the end of the week I will post the corrected sentence AND the diagram for the original and corrected sentences. Leave your thoughts and answer in the comments and you’ll be updated when the corrected sentence appears.