An Experimenter Studying Competition Wants to Compare the Behaviour of Students

Multiple Choice

An experimenter studying competition wants to compare the behaviour of students performing a difficult task with that of students doing an easy task.She designates participants for each task,making sure that each student has an equal chance of being in either the hard or the easy condition.This procedure is known as

A) random sampling.
B) random assignment.
C) conditional selection.
D) selective designation.