Answer:
C. The company hopes to build on that with a new app, MyMcDonald's which will be available in some areas by the end of 2021
Step-by-step explanation:
Since McDonald's are working on adding new methods to their digital ordering, creating an app is one method to achieve that. Also, that article reveals that they have digital ordering but wanted to add other methods; MyMacDonald's is one method of digital ordering. So, since they are planning to launch the new digital ordering method in the future, the app being available by the end of 2021 fits into the plan.