"Datawarehouse" is the correct answer for the above question.
Explanation:
The Datawarehouse is a collection of large data or database which holds the historical data and the current or operation data for future decisions of the profit of the organization.
The decision can be made after being analyzed the data which is extracted from the Dataware house.
The above question also states the database which works like the above-defined concept. Hence Datawarehouse is the correct answer to the above question.
0.75 miles of range is a low distance for a WAN (Wide Area Network) so a point-to-point WAN tehcnology such as IP-sec or SD-WAN can be preferred. But the least expensive option would be choosing IP-sec as specified in the question.