单项选择题

A.select product.id,product.name,storage.loc from product,storage where product.box#=storage.box#;
B.select product.id,product.name,storage.loc from product join storage on product.box#=storage.box#;
C.select product.id,product.name,storage.loc from product natural join storage on product.box#=storage.box#;
D.select product.id,product.name,storage.loc from product natural join storage;