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.
Analyze the relationship between 'Alcoa' and 'aluminium' within the context of the input sentence.
Options: product/material produced, distributed by, position held, brand