Step 1: Understand the context.
The manager is accused and wants to hide evidence before an audit inspection. We need a word that fits a dishonest action performed on records.
Step 2: Eliminate wrong choices.
Write and arrange are neutral actions. Preserve means to keep records safe, which is the opposite of what an accused person would want.
Step 3: Choose the correct option.
Manipulate means to alter or handle something dishonestly, which perfectly fits the context of tampering with records before an audit.
\[ \boxed{\text{manipulate}} \]