If you are in doubt, answer b or c . If an alternative does not follow the question, it is probably incorrect. Correct answers tend to be much longer or much shorter than incorrect answers. Correct items sometimes include clues from the question. Partly true and partly false statements are false.
Vague statements tend to be incorrect.
Of two clearly opposite statements, one is probably correct. Unfamiliar terms tend to appear in incorrect answers. If you look for a single answer and two choices mean the same, both are probably incorrect .