Each scenario describes particular database requirements. Match the database architecture to the scenario.

$($a$)$ A non$-$profit organization wants to assess the effect of a conservation campaign by analyzing regional utilizations of water and electricity by residents.

$($b$)$ A company wants to analyze the impact of news stories on all stock price data across Europe and Asia.

$($c$)$ A company stores employee, customer, and product info in separate databases. The company wants to simplify interactions with these databases for the accounting department.

$($d$)$ A non$-$profit organization stores a user's demographics via the user's browser's built$-$in cache.