Although many video games are situated in fantasy worlds quite unlike our own, others feature human characters that embark on careers, get married, have their own children, just as real people do.
A. that embark on careers, get married, have their own children, just as real people do : "that" in gmat should not be used to refer to the people in general. "who" fits in perfectly when you want to refer to people. However, don't discard this option unless you find a better choice
B. who embark on careers, just like real people, to get married and have children of their own : Here, the meaning of the original sentence is distorted or modified. This choice implies that the characters embark on careers "to get married and have children". This can be striked out.
C. who, just like real people, begin to embark on careers; they also get married, having children of their own : Look at the sentence (or a clause) before the semicolon. It is incomplete. It just says who begin to emark on careers. Strike it out since this choice is grammatically incorrect.
D. who embark on careers, just like real people getting married, and have children of their own : Again, the meaning of the sentence is not very clear. It seems that the comparison is between people who embark on careers with people getting married. Strike out the choice.
E. who, just like real people, embark on careers, get married, and have children of their own - Good Choice. The meaning of the original sentence kept as is and no grammatical errors are evident.
Hence, the answer choice is E.
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