The Base Ten Chart is a System of Units. Select the statement that is true. O The Units of each column can increase or decrease 20 times. Each unit column on the Base Ten Chart has a value. The value of the Unit column to the left of any given unit column is always 10 times greater and the value of the Unit column to the right is always 10 times less. O All unit columns are greater than the column to their left. O All unit columns are less than the unit column to their right.