You act for a mortgagee of residential property in NSW. The mortgage is registered. Your client instructs you that the mortgagors occupy the property as their home, and have defaulted under the mortgage in the payment of two monthly instalments. Your client seeks your advice as to what must be done first to legally enforce the terms of the mortgage. Which of the following answers best describes the response you should provide? Select one answer only. Group of answer choices A. Issue proceedings in the Supreme Court for recovery of the principal sum, and all interest and costs. B. Issue a notice under s 57(2)(b) of the Real Property Act 1900. C. Issue proceedings in the Supreme Court for an order for possession of the property. D. Issue proceedings in the District Court for a declaration that the mortgagor is in default