The graph of the accompanying figure shows the average annual percentage change y = f(t) in a particular country's gross national product (GNP) for the years 1985-1990. dy Choose the correct graph of dt %3D O A. B. Ay (%) 10- ^y' 10- 10- 8- 1990 1985 1990 64 -10- -10- 4- OC. D. 2- ^У 10- 10- 0+ 1985 1986 1987 1988 1990 1989 Year 1985 1985 1990 1990 -10- -10-
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