irisha was disappointed because she doesn't like tuna and is allergic to tilapia. She ordered a salad instead. The server was very apologetic. Sirisha did not enjoy herself because of all of the following EXCEPT:

a$.$ It the core is bad, it does not affect dissatisfaction if the service is good.

b$.$ Customers routinely evaluate the core of the purchase itself$$the dinner.

c$.$ The customer expects a provider to meet the basic requirement of offering the core product$$trout$.$

d$.$ If the core product$$the dinner$$is good, it doesn't enhance satisfaction because it was expected to be good