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In what year was Edward born?

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by BTGmoderatorLU » Tue Oct 17, 2017 12:00 pm
In what year was Edward born?

(1) In 1988, Edward turned 17 years old.
(2) Edward's sister Lisa, who is 14 months older than Edward, was born in 1970.

The OA is A.

Can any expert help me with this DS question? Thanks.
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Source: — Data Sufficiency |