Producers, including Alcoa Inc (NYSE: AA - news ) and Rusal (HKSE: 0486-OL.HK - news ) , have recently blasted China's swelling exports as a factor behind plunging primary aluminium prices.
Utilize the input text as a context reference, choose the right relationship between 'Alcoa' and 'aluminium' from the options.
Options: position held, distributed by, product/material produced, brand