Which of the following features helps to prevent shoulder surfing?

Native resolution refers to a monitor's optimal pixel density for image clarity and has no impact on viewing angle security.

Auto adjust is a monitor function that optimizes brightness and contrast settings, not a security control.

Degaussing demagnetizes CRT monitor components to correct color distortion and has no relevance to shoulder surfing prevention.

A privacy screen (also called a privacy filter) uses micro-louver optical technology to darken the display from side angles while keeping it visible from directly in front. This physically prevents bystanders at an angle from reading sensitive on-screen information, making it the purpose-built countermeasure against shoulder surfing attacks.