Timber is important to the Canadian economy. Clearcutting can be a problem. What are government solutions for this problem? (select all that are correct) a placed a quota on the amount of timber that is exported

b money is being spent to protect forest

c seedlings are being planted

d set aside protects land in parks and reserves

Using mr smith and his id, identify two potential internal validity threats that might affect the a—b design. tell me how that threat might impact conclusions in the a—b design. note #1: you cannot use maturation (since i already did that one for note #2: there are some mr smith id threats that won’t have much impact in a single case design.