Myocardial Infarction prevention

You are interested in evaluating the effectiveness of a new ambulance-based intervention to Myocardial Infarction prevention. To evaluate the overall performance of a health service, you design a study using similar methods as you would to track disease. You select a group of individuals who experienced Myocardial Infarction  and a group of similar individuals who did not experience Myocardial Infarction ,and inquire whether or not the individuals received the ambulance-based intervention.

Select the evaluation study design that this best describes?

A. Case-control design

B. Randomized design

C. Simultaneous non-randomized design

D. Combination design