DrPeacock Is Investigating the Effect of the Amount of Daycare

Multiple Choice

Dr.Peacock is investigating the effect of the amount of daycare fees on preschooler's language development.To do this,she finds a handful of daycares that differ according to their weekly fees (some are very expensive,and others are not) ,and she quietly sits and records the number of words spoken by random samples of children throughout the day in each daycare.What type of research method is Dr.Peacock using?

A) experiment
B) naturalistic observation
C) case study
D) survey