OA A lurking variable is a quantitative variable that has an infinite number of possible values that are not countable In addition lurking variables are typically very large numbers that make them difficult if not impossible to include in a study OB A lurking variable is a quantitative variable that has either a finite number of possible values or a countable number of possible values In addition lurking variables are typically equal to zero or almost equal to zero C A lurking variable is an explanatory variable that was not considered in a study but that affects the value of the response variable in the study In addition lurking variables are typically related to explanatory variables in the study OD A lurking variable is a response variable that was not considered in a study but is also affected by the casual relationship of the explanatory variables in the study In addition lurking variables are typically related to response variables in the study What is a confounding variable OA A confounding variable is a response variable that was not considered in a study whose effect cannot be distinguished from a second explanatory variable in the study OB A confounding variable is the explanatory variable on which a study has been focused OC A confounding variable is an explanatory variable that was considered in a study whose effect cannot be distinguished from a second explanatory variable in the study OD A confounding variable is a response variable that has an effect on the explanatory variable but it cannot be accurately measured in the study