Which Order of Timber Harvesting Methods Goes from Least Conservation

Multiple Choice

Which order of timber harvesting methods goes from least conservation of biodiversity to most conservation of biodiversity?

A) clear-cutting,selective harvesting,strip harvesting
B) strip harvesting,shelterwood harvesting,clear-cutting
C) selective harvesting,strip harvesting,shelterwood harvesting
D) clear-cutting,strip harvesting,shelterwood harvesting
E) All harvesting methods increase biodiversity equally.