Why Do Corridors Increase the Effectiveness of Conservation Reserves

Why do corridors increase the effectiveness of conservation reserves?

A) They increase the effective area for resident species, facilitating the conservation of species that require a large habitat area to survive.
B) They provide access to a greater diversity of habitat types, providing greater possibilities for a good match between species and environment.
C) They facilitate hunting because important games species traverse corridors, where they are more easily encountered.
D) They mitigate the effects of invasive species.