The term that describes broad groups of individuals who share an interest in a given social issue is a/an:

What is the term used for the potential confounding variable in a time-series study in which the measuring procedures may be inadvertently changed over time?

A) measurement error B) history C) instrumentation D) attrition

Both parties use the tactic of _______________to deny or delay the president's choice for Supreme Court justice

Fill in the blank(s) with correct word