Subsidy is a synonym of Benefit. Benefit is a type of Payment. Payment is related to Car. 
Preference is related to Prefer. Prefer is a synonym of Choose. Choose is related to Refuse. Refuse is related to Deny. 
Subsidy <--Synonym--> Benefit --IsA--> Payment <--RelatedTo--> Car 
Preference <--RelatedTo--> Prefer <--Synonym--> Choose <--RelatedTo--> Refuse <--RelatedTo--> Deny 