Answer:
C. Line.
Step-by-step explanation:
In the world of fashion, the trending styles and fashions are the 'hot' ones. And the manufacture of these clothes/ designs may be on a single manufacturer or more than one.
There are a number of 'words' used to specify a particular category. A fashion designer may label his/ her designs as a specific line, in regards to the purpose of their production. Likewise, a line is a term generally used to refer to a manufacturer's collection of styles.