For cell stock A, you made a 1:100 dilution and figured out the concentration is 3.3x105 cells/mL. The concentration of the original stock (before dilution) is_________________? Question 4Select one: a. 3.3x103cell/mL b. 3.3x105cells/mL c. 3.3x107cells/mL d. 3.3x106cells/mL