How did DataSpark get its data inputs to find out the movement of people? A) Pings to mobile phone via invisible beacons and uses the latency to know where the internet online users are located. B) Exploits the analytics from payment patterns when transacted over the telco(Singtel)'s mobile application to locate where the shoppers are. C) Users the telco (Singtel)'s WIFI network via mesh triangulation to discover groups of users. D) Uses the telco (Singtel)'s mobile phone cell towers to estimate where the people are located via their hand phone signal strength.

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Business intelligence tools are the tools used for analyzing, retrieving, sorting, and filtering information from different business intelligence systems. They are used for creating reports, visualizing large volumes of data, and decision-making.