Identify the examples of isomorphism.
(a)-a new bakery offering some gluten-free options opens in town, but stops offering these options due to low demand.
(b)-a new coffee chain does not initially offer any specialty sweet drinks with syrup, but adds them to the menu once customers point out that these desirable drinks are available elsewhere.
(c)-a new airline company offers cheaper fares than its competitors, but eventually faces pressure from other airlines to set prices equivalent to others in the industry.
(d)-a college president decides to introduce a new academic department, "public policy studies." initially the department offers classes with only pass/fail grades, but is pressured to offer classes with
more conventional grading scales.