How would you define a relational database ?
a. data stored in a table
b. data stored in multiple tables each with a relationship to each other
c. data arranged in a table as rows and columns so data can be extracted at an intersection rather than reading the whole table from beginning to end
d. database design follows the twelve principles proffered bh dr. edgar f. codd

(D) Database design follows the twelve principles proffered by Dr. Edgar F. Codd

Explanation:

 The relational database is basically based on the relational model of the data which is proposed by the Dr Edger F. codd and he mainly introduced the twelve basics principle of the database designing in the database system. He also contributed various valuable principle in the computer science.

The twelve principle are:

The first rule of the relational database is the information rule as it represented all data or informationIndependence of the integrityViewing various updating ruleLogically treatment of various NULL valueIndependence of the physical databaseDistribution in-dependencyVarious delete, insert and update rulesThe overall logical description of the database are basically stored in the database directoryThere is no subversion ruleThere is guarantee accessing ruleProper rule for data language The relational database level actions