Descriptive studies do not
a. study relationships between variables
b. use concepts
c. use operational definitions
d. tell why something occurred
e. descriptive studies do all of the above
I believe the answer is d. tell why something occurred Descriptive study is aimed to describe the characteristic of certain phenomenon or occurrences. Since it only consists of a pattern and external representation, the data that gathered through descriptive study couldn't be used to create a causal relationship.
