Which Is an Example of Attrition

Multiple Choice

Which is an example of attrition?

A) A new medication is given for a bacterial infection for seven consecutive days with the patient presenting with excellent results at the end of treatment.
B) A study that involves parent and child interactions has lost four participants due to families moving out of state.
C) The sample of patients with dementia had a significant family history of the disease.
D) None of these