Which is an unavoidable error in this experiment?
Responses
A The tube in the machine is on it's seventh run and may contain the remains of old experiments.The tube in the machine is on it's seventh run and may contain the remains of old experiments.
B Injection of the sample into the machine requires a certain minimum time.Injection of the sample into the machine requires a certain minimum time.
C Darryl washed the sample with the wrong solvent.Darryl washed the sample with the wrong solvent.
D Darryl set the temperature on the machine to 350°C instead of 400°CDarryl set the temperature on the machine to 350°C instead of 400°C