What externalities arise from beautiful and ugly buildings and how do we deal with​ them? Beautiful buildings create a​ _________. A. positive production​ externality, which we deal with by placing heritage designations on properties of significant historical value. B. positive consumption​ externality, which we deal with by imposing higher property taxes on​ higher-valued properties C. positive consumption externality and there is no need to deal with this externality because owners have enough incentive to keep these buildings in good repair D. positive consumption​ externality, which we deal with by having competitions that encourage beautiful design and landscaping