Researchers wanted to determine if smoking cigarettes inhibited the development

Question

Researchers wanted to determine if smoking cigarettes inhibited the development of the teenagers. They randomly sampled a large number of teenagers, recorded whether they smoked or not and measured their development. Which of the following is true?  

A) This is an observational study and development is the explanatory variablE

B) This is an experiment and development is the explanatory variable.

C) This is an observational study and smoking is the explanatory variable.

D) THis is an experiment and smoking is the explanatory variable

A) This is an observational study and development is the explanatory variablE

B) This is an experiment and development is the explanatory variable.

C) This is an observational study and smoking is the explanatory variable.

D) THis is an experiment and smoking is the explanatory variable

Explanation / Answer

Since researchers aren't influencing any variable to check the effect on other variable, this is an observational study and smoking is the explanatory variable.

Option C is correct.

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