Answer:
Here the correct answer is A) Sustainable marketing concept.
Step-by-step explanation:
Sustainable marketing concept is a new marketing concept ( which can be defined as a philosophy where producers should find out and understand what is consumers needs and wants and then make decision regarding goods or services to be produced ), which has became a game changer in today's society, where companies and producers have started to realize that they need to meet the needs and wants of future generation , but without messing up the future.
McDonald's have also adopted a similar strategy where they're understanding the demands of new generation and that's why they have added new healthy food options in their menu, they're trying to adopt to the changes in the society.