After Completing the Power Analysis the Researchers Determine They Need

Multiple Choice

After completing the power analysis the researchers determine they need a sample size of 400 to have adequate power in their study. After enrolling subjects they have a lower response rate than anticipated and they only enroll 320. Inadequate enrollment may increase the risk of:

A) Systemic bias
B) A type I error
C) A type II error
D) Statistical Significance