Card 14 / 180: In order to stock the appropriate types of foods in its store, a local grocery chain conducts a voluntary survey of its customers as they leave the store. The survey asks for the total number of trips the customer makes per month to the store. Calculate the median number of trips based on the following numbers from the first few surveys: 3, 6, 9, 2, 4, 5, 1.
A) 9
B) 3
C) 4
D) 5

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