Yuki Read a Study That Compared Pre- and Post-Test Performance

Multiple Choice

Yuki read a study that compared pre- and post-test performance between two different in-service training methods for teaching emergency first aid to teachers.
She really found the study interesting but there was no description of how the
Two treatment groups were formed. This is a flaw in this _______________
Research report.

A) survey
B) observational
C) experimental
D) correlational