Control subjects in an experiment should not know whether they are in the control or experimental group should be similar in most ways to the experimental subjects should have essentially the same interactions with the researchers as the experimental subjects all of the above

Should be similar in most ways to the experimental subjects

Explanation:

Control subjects in an experiments are subject that are not exposed to the independent variable, they usually have the same features with the experimental variable which is exposed to the independent variable. Control variable are used as a standard to know the effect of the independent variable on the experimental variable.

answer; control group;