You will be given a definition of a task first, then some input of the task.
In this task, you are given a context and four options. Each option is a suggested ending for the context. You should read the context and pick the best ending for the context. Please answer with "A", "B", "C", and "D".

[header] How to account for petty cash [title] Purchase a lock box. [step] When you are starting a petty cash fund, you need to buy a lock box that will hold the cash available for use and the receipts for what has been spent. You need a small, metal box that can easily fit within a desk drawer. <sep> (A) Make sure you are aware of key sizes so that the lock box will not be too small to fit behind your desk in a hotel room. [substeps] You might also consider buying a lock case for added security. (B) This will keep the cash from being misplaced or damaged in the next steps. [substeps] Locks should typically be used for personal use. (C) Pour your money into the box and secure it closed by nailing five nails in it. Finish this operation by tightening the screws that secure the lock box. (D) This box can either have combination lock or have a key lock, depending on what is best for your particular office. Either way, it needs to be extremely secure to deter people from tampering with the box.
Output:
D