hich statement is true about OUTER JOIN?

Question $9$Select one:

a$.$

A right outer join will return all columns from the table on the right side of the query, only if there are matches in the left$-$hand table.

b$.$

A left outer join will return all records from the table on the left side of the query, even if there are no matches in the table on the right$-$hand side of the query.

c$.$

An outer join is used only if you want to exclude null values from either table.

d$.$

An OUTER JOIN is used to join two tables$$ outer columns, in order to create a composite table.