Final answer:
Samson's argument likely posits that waste pickers play a significant role in the public sphere by collaboratively addressing the free-rider problem and contributing to the public good through waste management.
Step-by-step explanation:
Samson's overall argument regarding collective mobilization by waste pickers in relation to the public sphere is most likely option (b) Waste pickers significantly contribute to the public sphere. This assertion would be supported by an understanding that collective mobilization can create benefits for all when everyone contributes, which can be related to the public good as mentioned in the provided references. Waste pickers forming a collective could be seen as a way to avoid the free rider problem described in the steps, wherein individuals hope to benefit from public goods without contributing themselves. However, when everyone decides not to contribute, based on a rationale similar to the one explained between Samuel and Rachel, the public good—which is the efficient management of waste in this context—would not be realized, to the detriment of the community at large.
Through collective mobilization, waste pickers can coordinate their efforts, influence policymaking, and ensure that their services are recognized as essential contributions to the cleanliness and sustainability of public spaces. Therefore, Samson's view would acknowledge the pivotal role waste pickers play in the public sphere through their collective actions and how these actions improve the public good.