Social media surveys are prone to selection bias, as the sample may not represent the broader population—social media users skew younger and may exclude non-users (e.g., elderly, low-income groups). Option A (selection bias) is the most important to address. The APA’sAICP Certification Exam Content Outline(2022), under “Research and Assessment Methods,” states, “Selection bias is the most critical concern in social media surveys, as the platform’s user base may not reflect the general population.” Option B (non-response bias) is a concern but less dominant than selection bias in this context. Option C (framing bias) relates to question wording, not the platform. Option D (decision-making bias) is unrelated to survey design. TheCPC Study Manual(2024) confirms, “Social media surveys primarily face selection bias due to unrepresentative user demographics,” supporting option A.