One way in which experimental research differs from observational research is that only experimental research can show cause and effect and is denoted as option D.
What is Cause and effect?
This is the situation in which one event contributed to the formation of another according to the type of relationship between the variables.
This is commonly used in experimental research so as to prove the interconnection and is tested by scientists in other to ascertain its authenticity.
Read more about Experimental research here https://brainly.com/question/17274244
#SPJ1
