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Parallelogram ABCD has vertices at A(-1,3), B(8,3), C(3.-2), and D(-6.- 2). The slope of BC is 1, and since AD is parallel to
BC, its slope is the same. Which of the following point-slope equations is the line containing AD?
A y -1= x-3
B. y-1=x+3
C. y-2=x-6
D. y+2 = x+6