Answer:
The correct option is A.
Explanation:
A logic puzzle grid is the tool that contain clues and deductions which are used to determine all the correct combinations of data points.
Logic puzzle grid is basically an information table in which every name or color, number can only be used in one combination.
"•", "×" and "✓" are used in logic puzzle grid.
The symbol "•" is used in a logic puzzle grid. Therefore option A is correct.