SQL a. has become the de facto standard database language b. can be used to define database systems c. both a. and b. d. none of the above

a.)has become the de facto standard database language

Explanation:

SQL known as Structure Query Language can be described as domain specific language that is Been used in execution of tasks son database. Those task could be updating of data.

Database admistraion.

Microsoft SQL server is one of the example of database system that uses SQL.

It should be noted that SQL has become the de facto standard database language

the formula for work is

f*d

therefore work=2.0n*3.0=6n*m