Seats and racks in parts of some underground train carriages in Guangzhou city were stripped to fit in more rush-hour commuters. The changes have been made to 29 trains running between 15 different stations on Guangzhou Metro Corp's Line 3. The removal of a small area of seating and passenger racks at the ends of some carriages means each train can now comfortably hold an extra 46 passengers, while during the rush-hour periods, a total of 78 extra passengers can be accommodated.
Which line of Guangzhou Metro Corp's removed seats and racks to accommodate more people?
A. Line 1
B. Line 2
C. Line 3
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