Final answer:
The fashion designer with the red, white, and blue logo known for 'classic American cool' is Tommy Hilfiger.
Step-by-step explanation:
The fashion designer known for his red, white, and blue logo who created a style of fashion known as "classic American cool" is c) Tommy Hilfiger. While Paul Rand was a significant figure in American design, known for creating iconic logos in the 1950s and 60s, the question pertains to fashion design and a specific logo associated with a fashion brand. Tommy Hilfiger's eponymous brand is widely recognized by its red, white, and blue logo, and it represents a quintessential part of American fashion identity.