单项选择题According to Annex V to MARPOL 73 78,garbage containing plastic is permitted to be disposed of by().
A.incinerating offshore
B.discharging when at least 12 nautical miles from nearest land
C.grinding to less than 1 and discharging at least 12 nautical miles from nearest land
D.grinding to less than 1 and discharging at least 25 nautical miles from nearest land