Aaron was four years old when he saw his elder brother Charlie throw a firecracker into a fire. There was a loud explosion, and Charlie's face got burnt. Therefore, Aaron learnt from a young age never to play with fire. This scenario is an example of .

Jason works as an accountant in a department store. he needs to keep a daily record of all the invoices issued by the store. which file naming convention would him the most? a)give the file a unique name b)name the file in yymmdd format c)use descriptive name while naming the files d)use capital letters while naming the file