Which of the following describes an oligopoly? eight to ten firms producing 90 percent of the output one firm producing 95 percent of the output eight to ten firms producing 60 to 70 percent of the output four firms producing 70 to 80 percent of the output

Which of the following statements about the shang dynasty’s system of writing is false? a. no evidence of the writing system has survived. b. the shang often wrote on bamboo parchment. c. the writing system had over 3,000 characters. d. the writing system developed from a system of pictographs.