Answer:
c. trade dress.
Step-by-step explanation:
Trade dress - 
Trade dress is a type of intellectual property . 
It refers to the visual characteristics of any goods and services , which helps to give the proper information and source of the product , is referred to as the trade dress . 
Trade dress is a type of indication or trade mark of the manufacturer and is different for different products. 
Hence , from the given scenario of the question , 
The correct answer is trade dress .