以下的查询语句中哪一个表示相等连接

A．SELECT
i.id_number, m.manufacturer_id
FROM
inventory i, manufacturer m
WHERE
i.manufacturer_id=m.manufacturerid;
B．SELECT
i.id_number, m.manufacturer_id
FROM
inventory i, manufacturer m
WHERE
i.manufacturer_id=m.manufacturer_id(+);
C．SELECT
i.id_number, m.manufacturer_id
FROM
inventory i, manufacturer m
WHERE
i.manufacturer_id(+)=m.manufacturer_id;
D．SELECT
i.id_number, m.manufacturer_id
FROM
inventory i, manufacturer m
WHERE
i.manufacturer_id=i.manufacturer_id
AND
i.id_number=2365;

给水泵不允许在（）运行。