Please match the method with the correct example

Lab experiment

Field experiment

Natural experiment

Conjoint Analysis

A$.$ Participants are repeatedly asked to choose one gym from two different types of gyms. On each gym they have information on review rating, monthly fees, gym facilities and location.

B$.$ Students were asked to participate in a computer study where they had to wear eye tracking glasses and look at different product packagings and indicate their willingness to purchase a product.

C$.$ A restaurant offers special menu one week while not offering the menu next week, records sales during both weeks to estimate the effect of new menu on overall sales.

D$.$ A regulation mandated that road and construction workers who wish to work in New York City should complete a $40$ hour safety training. This training is not required for workers operating in Chicago and Boston. To identify the effect of safety training on accidents we can use New York city as the treatment group and Chicago, Boston as the control group.