Let us check the option one by one. (A) For S. Stop, the increase in cost per square feet in the year 2006=2135−1889=246 (B) For S. Stop, the increase in cost per square feet in the year 2007 =2464−2135=329 (C) For Pantaloon, the increase in cost per square feet in the year 2006 = 1996−1729 = 267 (D) For Vishal, the increase in cost per square feet in the year 2006 =1802−1832=−30 We can see that the maximum increase in its cost per square feet is for S.stop stores in the year 2007. Hence, option B is the correct answer.