Concerning the Master Production Schedule (MPS), which of the following statements are true? Select all correct answers. With the typical use of time fencing, during a frozen or ice period all MPS changes are allowed. The Available to Promise (ATP) lets the sales team know how much and when product is available for sale. Time fencing is a method of moderating or stabilizing production planning. The use of discrete Available to Promise (ATP) is limited to manufacturing individual products, such as automobiles, mobile phones, and laptops. None of the above