Final answer:
The phrase in question indicates that a person named Norr is visiting the Central Oregon Council on Aging, thus the correct answer is b) It refers to a person named Norr visiting a senior center.
Step-by-step explanation:
The phrase "Norr happens to head to the central Oregon council on aging" means that a person named Norr is making a visit to the Central Oregon Council on Aging, which is likely an organization that provides services to seniors. Option b) 'It refers to a person named Norr visiting a senior center' is the correct interpretation of this phrase. It is not describing a tourist attraction, a mysterious location in a novel, nor a random phrase without meaning.