Final answer:
The fourth step of ABC system implementation is to evaluate the logical connections between topic sentences and the thesis statement, using various evidence types to enhance credibility.
Step-by-step explanation:
The fourth step of implementing the Activity-Based Costing (ABC) system involves checking the validity of the logic used in the body paragraphs of the written form. This step involves putting the designed system into action and integrating it into the existing processes and operations of the organization. During this stage, it is crucial to assess the logical connection between topic sentences and the thesis statement to ensure the arguments are sound. Part of this validation process includes utilizing a variety of evidence types to build credibility with readers and confirming the soundness of reasoning strategies employed. This meticulous evaluation of paragraphs ramps up the overall quality of the drafting process.