D. They provide a platform for collaboration
Answer:
The real world AI application is Google Duplex. It is able to receive orders for making reservations. Then it calls the shop or the place and deals with the person and talks to him very fluently and informs you about the reservation. Some other general types of AI application are Google Assistant, Siri , Amazon Alexa and so on. But google Duplex is lot more advanced than them.
maintenance is the answer
Cools the engine oil, thsts what I think, but not sure bc u would cool the engine, and it's a fan
