he graph indicates that MPCs based on nondurables and services ("NDS") were much smaller than those based on total consumption ("Total"). Why might this be? a) Nondurables and services are less expensive than other types of consumption goods. b) Nondurables and services were disproportionately unavailable due to restrictions on face-to-face contact during Covid-19. c) Consumption of nondurables and services have been declining as a share of total consumption in the United States for decades. d) Nondurables and services were more ajected by supply chain shutdowns during Covid- 19