Final answer:
Central route processing often strengthens explicit attitudes.
Step-by-step explanation:
The correct answer is a) Strengthens.
Central route processing refers to the process of critically evaluating the arguments and logic presented in persuasive messages. It involves carefully scrutinizing the information and relying on one's own thoughts and beliefs to form attitudes or make decisions. When central route processing is employed, explicit attitudes are more likely to be strengthened as individuals engage in deep thinking and analysis.
For example, if someone is presented with a persuasive message about the benefits of recycling, they may critically evaluate the arguments presented, weigh the evidence, and consciously choose to adopt a positive attitude towards recycling. This process of central route processing strengthens their explicit attitude towards recycling.