Final answer:
The most fitting commonplace assertion for 'Road to Glory is a skateboarder's paradise' is its recognition as an established name in the skateboarding industry, as this suggests wide acceptance and high quality, aligning with the notion of paradise.
Step-by-step explanation:
The statement that would be a commonplace assertion for the claim that 'Road to Glory is a skateboarder's paradise' is: Road to Glory is an established name in the skateboarding industry.
Commonplace assertions are statements generally believed to be true by many people, often based on shared values or widely accepted views within a community. For instance, stating that a venue is an established name in an industry suggests widespread recognition and acceptance, which supports the claim that it is a paradise for those involved in the community. Therefore, acknowledging 'Road to Glory' as a well-known spot in skateboarding indirectly implies its high status and quality as a skateboarding location, aligning with the concept of a 'paradise' for skateboarders.