In an Experiment Subjects Are Given a Pre-Test in an Effort

Multiple Choice

In an experiment subjects are given a pre-test in an effort to assess their attitudes about a new federal sentencing law that Congress is debating.Subjects assigned to the experimental group are given a series of lectures by experts on the impact the new law will have on prison populations.Immediately after the last lecture,a post-test is given to measure any attitude changes.Anticipating what the test is designed to measure (because of the lectures) those in the experimental group are subject to the threat of:

A) diffusion
B) statistical regression
C) instrumentation
D) testing