（单选题）What is true about joinin

题目描述

AYou can join a maximum of two tables through an equijoin.

BYou can join a maximum of two columns through an equijoin.

CYou specify an equijoin condition in the SELECT or FROM clauses of a SELECT statement.

DTo join two tables through an equijoin, the columns in the join condition must be primary key and foreign key columns.

EYou can join n tables (all having single column primary keys) in a SQL statement by specifying a minimum of n-1 join conditions.