Whole Fruits Market took the following actions to improve internal controls. For each of the following actions, identify the internal control principle the company followed.

$\backslash$table$[[$a$.$ Digital time clocks are used to register which employees are at work at what times$],[$b$.$ The company divides responsibility for a transaction between multiple departments$],[$c$.$ Purchased an insurance $($bonding$)$ policy against losses from theft by a cashier.$],[$d$.$ Preprinted forms are used to reduce the chance of missing transaction details.$],[$e$.$ Each cashier is designated a specific cash drawer and is solely responsible for cash in that drawer.$],[$f$.$ Prohibit the recordkeeper from having control over cash.$]]$