Study the following graphic organizer.   based on the information provided, which of the following choices best completes the graphic organizer?   a. 1. singular, 2. common, 3. concrete, 4. countable b. 1. singular, 2. proper, 3. concrete, 4. countable c. 1. singular, 2. common, 3. concrete, 4. uncountable d. 1. singular, 2. common, 3. abstract, 4. countable       select the best answer from the choices provided a b c d