In the 1980s, black female workers at Delta Pride, a catfish processing plant in Mississippi, embarked on a union organizing drive. As part of this effort, the union was aggressive in publicizing wrongdoings by the employer, pressuring members of the board of directors to disassociate from the company, and sending postcards to over 100,000 Mississippi residents seeking their support for unionization. As a result of these tactics, the union won recognition. The tactics used in this organizing drive can best be described as:

A) A sympathy strike
B) A corporate campaign
C) A boycott
D) A work slowdown