In the body of your routine message making claims or requesting actions, you should ________.

A) clearly express your anger and frustration
B) warn the reader of the consequences of inaction
C) apologize for the inconvenience caused
D) give a complete and specific explanation of the details

Giving a complete and specific explanation of the details is crucial in a routine message making claims or requesting actions. This helps to ensure that the reader understands the situation fully and can take appropriate action. It also shows that the sender has put effort into making the message clear and informative. Options A, B, and C may not be necessary or appropriate depending on the situation, and could potentially harm the relationship between the sender and the recipient.