Final answer:
A large public company is most likely to have sufficient data availability for audit data analytics due to its more structured data systems and greater resources, along with regulatory requirements driving the need for sophisticated data infrastructure.
Step-by-step explanation:
The question asks which type of organization is most likely to have sufficient data availability for audit data analytics. Among the options, a large public company typically has more structured data systems and greater resources dedicated to data management which can support extensive analytical procedures. Such companies are also subject to regulatory requirements that drive the need for sophisticated data infrastructure. In contrast, smaller organizations or those with less stringent reporting obligations, like a small not-for-profit organization, a city government, or a mid-sized private company, may not have the same level of data availability and could be less suitable for the auditor's purpose when conducting audit data analytics.