PASCAL 2004 Problem 13

Nadia starts at S and walks at a steady pace once around the perimeter of a square park. Which graph best represents her distance from S as time passes?

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Answer Choices
A. pascal 2004 13a
B. pascal 2004 13b
C. pascal 2004 13c
D. pascal 2004 13d
E. pascal 2004 13e