What is a disadvantage of the experimental method

A)  Experiments often can't be done for practical or ethical reasons. 
B)  Only one variable can be studied at a time. 
C)  Length of time necessary to complete the study. 
D)  Inability to generate cause-and-effect conclusions.

Experimental Method

A scientific approach to research, where variables are manipulated to observe their effect on other variables, in a controlled environment.

Ethical Reasons

Considerations based on moral principles or values, often guiding decisions and actions in professional and personal contexts.

Practical Reasons

Reasons or motives based on practicality or usefulness, rather than theoretical or ethical considerations.