The price of used cars and trucks in US has increased by 21% including a 10% increase in April alone, while the volume of used car transactions is keeping going up to a record high. Which of the following group of economic variables will go up as a result of a booming used car market?
A. CPI but not GDP deflator, PPI and real GDP
B. CPI and GDP deflator, but not real GDP and PPI
C. CPI, GDP deflator and, real GDP, but not PPI
D. CPI, GDP deflator, real GDP and PPI