Which of the following is not a criminal case?

A、Possessing opium( 鸦片) of 100 grams.;
B、Cultivating opium poppies(罂粟) of 600 plants .;
C、 Possessing heroin(海洛因) of 30 grams.;
D、 Possessing methamphetamine(冰毒) of 20 grams.