You are directed in a lab procedure to add 4ml of water into a test tube. Which is the best measuring device for this job?

You are directed in a lab procedure to add 4ml of water into a test tube.  Which is the best measuring device for this job?

A.fill a 2ml serologic pipette 2 times

B.a 1ml in 1/10 serological pipette filled 4 times

C.a 5ml in 1/10 serologic pipette

D. 4 squirts of a disposable eyedropper

E. a Pipetman pipette