The description matches Casual Callers recruitment because: 1. Definition: - Walk-ins/unsolicited applications - Maintained in talent pools (HR databases) 2. Advantages: - Cost-effective (no agency fees) - 30 percent faster hiring for urgent needs (SHRM data) - Pre-screened candidates 3. Industry Usage: - Common in retail (Walmart), hospitality (Marriott) - Tech companies (Google's "cold applicant" database) 4. Distinction: - (A) Direct: Career fairs, advertisements - (C) Contractors: Third-party labor providers - (D) Campus: College placement drives Modern Trends: - LinkedIn profiles as digital casual callers - AI-powered applicant tracking systems Final Answer: (B) Casual callers