23. According to the statistics in Figure 2, which of the following statements is true? (A) China’s expenditure in R&D fell slightly in 2010, but reached a peak in 2019. (B) There was a slight downward trend in Japan’s investment between 2019 and 2020. (C) Between 2000 and 2010, there was a considerable fall in the Europe’s R&D investment. (D) The USA’s expenditure in R&D was highest at all times, compared with the other countries.