C. because they grade your get 'depends' on how many hours you study. Independent variables are also known as controlled variables which basically means that you control that variable for example the temperature of a room.
Hope it helps.
Answer:
<em>D. Separation of duties</em>
Explanation:
Separation of duties (SoD) is a fundamental concept in internal controls and is the hardest and often the most expensive to achieve.
<em>This aim is accomplished by distributing the tasks and associated permissions among multiple people for a specific security system.</em>
the answer is they often contain biases :)
Make sure you but no copyright, author, and date of publication, that may help.
