DrArrinson Is Interested in Whether Males or Females Tend to Be

Multiple Choice

Dr.Arrinson is interested in whether males or females tend to be greater risk takers.A computer search reveals that more than 100 different studies have investigated various types of risk taking, including smoking, fast driving, and unprotected sex.What can Dr.Arrinson use to combine the results of these 100 different studies as if they were all part of one big study?​

A) ​double-blind study
B) ​field experiment
C) ​clinical method
D) ​meta-analysis