Which of the following sets of characteristics specifically apply to relational databases?
i. When a user accesses data in a relational database for different purposes, the database tables reorganize
ii. A relational database is designed to maintain data and information about various types of data including objects, events, people, and places
iii. Data tables in a relational database are linked by the fields they have in common
iv. A relational database organizes data in tables composed of records or objects (the rows), and fields (the columns)