Suppose that sales is a two-dimensional array of 10 rows and 7 columns wherein each component is of the type int. Which of the following correctly finds the sum of the elements of the fifth row of sales?
A. int sum = 0;
for(int j = 0; j < 7; j++)
sum = sum + sales[5][j];
B. int sum = 0;
for(int j = 0; j < 7; j++)
sum = sum + sales[4][j];
C. int sum = 0;
for(int j = 0; j < 10; j++)
sum = sum + sales[5][j];
D. int sum = 0;
for(int j = 0; j < 10; j++)
sum = sum + sales[4][j];
Answer: B
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