In northern climates ice dams can form in gutters that can be dangerous for people walking underneath the gutters when the ice falls off the gutter and can cause damage to buildings from the penetration of water through the roof. To avoid ice dams in northern climates (including north Texas) you should: A. Do nothing, ice dams don't form in Texas. B. Install a gutter heating system. C. Use heat tapes installed on the edge of the roof and in the gutter. D. Don't put gutters on the roof