Final answer:
In SQL, the keyword used to specify the names of tables to be joined is c) JOIN. The JOIN clause is used in SQL to combine rows from two or more tables based on a related column and is typically used in conjunction with the FROM clause.
Step-by-step explanation:
In an SQL query, the keyword used to specify the names of tables to be joined is c) JOIN. The JOIN clause is utilized in SQL to combine rows from two or more tables, based on a related column between them.
Generally, it is used in an SQL statement alongside the FROM clause, where the FROM specifies the tables to select from and the JOIN specifies the tables to be joined and the conditions of the join.
There are several types of joins such as INNER JOIN, LEFT JOIN, RIGHT JOIN, and FULL OUTER JOIN, each defining how the tables ought to be joined considering matching data in the joined tables.
In an SQL query, the FROM keyword is used to specify the names of tables to be joined.
Therefore answer is c) JOIN.