What is a common challenge faced by agencies involved in out call operations?

High costs and resource demands are a significant challenge faced by agencies involved in out call operations. These operations often require substantial financial investment for personnel, equipment, and other resources necessary to ensure effective and safe intervention. Agencies must allocate budgets not only for immediate needs but also for ongoing operational costs, training, and support systems to follow up on engagements.

Additionally, because these operations can require a considerable workforce, the associated resource demands increase, making it essential for agencies to strategize meticulously about how to use their finances and manpower efficiently. The complexity and unpredictability inherent in out call operations can exacerbate these financial and logistical challenges, making funding a critical issue for sustained effectiveness in combating human trafficking.

While the other options mention lack of experienced personnel, limited operational knowledge, or excess volunteers, these are often secondary to the overarching issue of funding and resource management. If an agency lacks the financial resources to support its mission, it may face hurdles regardless of the personnel's experience or knowledge levels.