[9급 지방직 자료조직개론 2020년 20번]

DDC 제23판의 일부를 발췌한 것이다. ㉠, ㉡에 들어갈 Tables(보조표)로 옳은 것은?

331.6                Workers by ethnic and national origin
      .62                Immigrants and aliens
      .620 9           History, geographic treatment, biography

                              Class here immigrant and alien workers in specific areas, e.g., immigrant workers in Canada 331.620971

      .623-.629     Immigrants and aliens from specific continents, countries, localities

                              Add to base number 331.62 notation  3－9 from ( ㉠ ) for place of origin, e.g., immigrant workers from Korea 331.62519

      .63                Native-born workers by ethnic group
      .631-.639       Native-born workers of other ethnic groups

                              Add to base number 331.63 notation 1－9 from ( ㉡ ), e.g., Korean Americans  331.63957

㉠ ㉡