When running a Supply Chain Network Design optimization model, which of the following statements are true? Select all correct answers. The impact of network design on safety stock levels is captured in the facility costs. Left on their own, these models will tend to evenly distributing demand across potential DCs and other facilities. The most flexible (but not necessarily the lowest cost) manufacturing strategy is to have every plant produce every product. Multi-commodity flow models are more complex and require more data than single commodity models. None of the above