The Southern Blue Ridge ecoregion contains many large blocks of unfragmented temperate forest. These forest blocks support high densities of breeding birds, as well as large populations of other animals, such as forest salamanders. Scientists have identified areas of core forests in this ecoregion that are protected and allowed to undergo natural disturbances. Surrounding these core forest areas are matrix forests, which are managed for multiple uses. Which of the following would be allowed to occur in core forest areas of this ecoregion? A. clear-cutting of trees
B. spread of forest fires
C. management of game
D. building of hiking trails