What is perhaps the greatest disadvantage or limitation associated with descriptive research methods

A)  the inability to identify cause-and-effect relationships 
B)  the fact that these methods usually focus attention too narrowly on a single variable 
C)  the restriction to very small samples 
D)  an insensitivity to ethical concerns

Descriptive Research Methods

Research methods that aim to observe, describe, and document aspects of a situation as it naturally occurs, without manipulating the environment.

Cause-and-Effect Relationships

The relationship in which one condition or event (cause) directly leads to another condition or event (effect).

Disadvantage

A condition or situation that makes it more difficult for someone or something to succeed or achieve a goal.