You infect bacteria with bacteriophage and you see a confluent, clear plate.What happened?

You infect bacteria with bacteriophage and you see a confluent, clear plate.  What happened?

a. You forgot to add the bacteriophage to the bacteria

b. You forgot to add the bacteria to the test tube

c. There were too few bacteria to count

d You probably had a serial dilution of around 10-7

a.    There were too many bacteriophage to count