Below are the six internal control objectives. A$)$ Validity B$)$ Completeness C$)$ Authorization D$)$ Accuracy E$)$ Classification F $)$ Proper period cutoff For each of the following control procedures, identify the internal control objective that applies and place the correct letter in the space provided. $1.$ Match shipping documents to sales invoices before recording the transaction in the sales journal. $2.$ Ensure that the sales invoices are recorded in the correct month. $3.$ The sales manager must approve any discounts taken after the discount period $.$