Answer:
B. being reasonable and specific
Explanation:
Persuasive writing is a form of building logical arguments along with the emotional appeal. It helps in molding the reader's point of view as per the thoughts of the writer. Valid information is added and the argument is present in the way that it influences the reader.
In the given message, the writer had used the technique of being reasonable and specific. He had presented his problem in a subtle manner along with the proper solution to it.