A Manual WBC Count Is Performed Using a System That

A manual WBC count is performed using a system that makes a 1:20 dilution of blood. When the cells in the four large corner mm² of the hemocytometer are counted, the following numbers of cells are obtained: 8, 12, 9, and 11. What would be the next step?

A) Count the cells in all 9 mm² of the hemocytometer.
B) Redo the dilution of blood using a new 1:20 dilution.
C) Redo the dilution of blood using a 1:100 dilution.
D) Calculate the count using the values from the 4 mm² and report the result.