ABC Corp. is a social networking site with access to a large amount of customer data. ABC's senior management is often concerned with how to ethically collect, store, and use Big Data. The company is also grappling with managing relationships in a multigenerational workplace since its oldest team members are baby boomers while its youngest are Gen Z$.$ During which of the following decades would ABC Corp.$\text{'}$s concerns fall within the timeline of ethical and social responsibility?

a$.1990$s

b$.1960$s

c$.1980$s

d$.2010$s