What Is the "Or" Rule

What is the "or" rule?

A) An assumption that the variable targeted in the assessment is present if any one informant reports it.
B) An assumption that the variable targeted in the assessment is present if two or more informants report it.
C) An assumption that the variable targeted in the assessment is present if three or more informants reports it.
D) An assumption that the variable targeted in the assessment is present if four or more informants reports it.