Gabriela is building a brick wall. Each row of bricks is 6.5 cm6.5\,\text{cm}6.5cm6, point, 5, start text, c, m, end text tall except that the top row is 1 cm1\,\text{cm}1cm1, start text, c, m, end text shorter because it has no mortar. She wants the wall to be 259 cm259\,\text{cm}259cm259, start text, c, m, end text tall.
Which equation can we use to determine , the number of rows of bricks Gabriela needs in her wall?
Choose 1
Choose 1

(Choice A)
A
6.5(r−1)=2596.5(r-1)=2596.5(r−1)=25 96, point, 5, left parenthesis, r, minus, 1, right parenthesis, equals, 259
(Choice B)
B
6.5r−1=2596.5r-1=2596.5r−1=2596, point, 5, r, minus, 1, equals, 259
(Choice C)
C
6.5r−r=2596.5r-r=2596.5r−r=2596, point, 5, r, minus, r, equals, 259
(Choice D)
D
6.5(r−1)+1=2596.5(r-1)+1=2596.5(r−1 )+1=2596, point, 5, left parenthesis, r, minus, 1, right parenthesis, plus, 1, equals, 259