Which of the following requires that a table must not have any repeating values?

The following code sums all the values in the two-dimensional array. What is the missing code? sum = 0for row in range(grid.getHeight()): for column in range(grid.getWidth()):

A. sum += grid[column][row] B. sum += grid[row-1][column-1] C. sum += grid[column+1][row+1] D. sum += grid[row][column]

Think of different users for the database of Figure 1.2. What type of applications would each user need? To which user category would each belong and what type of interface would they need?

What will be an ideal response?