Read the following sentences. __________ are common, everyday people, places, things, and ideas. __________ refer to a specific person, place, thing, or idea and are capitalized. which answer best completes the above sentences?
a. common nouns . . . proper nouns
b. concrete nouns . . . abstract nouns
c. countable nouns . . . uncountable nouns
d. collective nouns . . . compound nouns