Which of the following physical security controls can prevent laptops from being stolen?

Encryption is a method of securing data by converting it into a coded format that is unreadable without a decryption key. While it protects the information on a stolen laptop, it does not physically prevent the laptop itself from being taken. Therefore, encryption does not serve as a physical security control against theft.

LoJack is a tracking software that helps locate stolen devices by sending signals to law enforcement. Although it can assist in recovery after a theft has occurred, it does not physically secure the laptop, making it ineffective as a preventive measure against theft.

Multifactor authentication (MFA) is a security protocol requiring multiple forms of verification before granting access to a system. While MFA enhances security by protecting data access, it does not physically deter theft of the laptop itself and thus fails to act as a preventative physical security control.

Bollards are physical barriers typically used to protect buildings or pedestrian areas from vehicles. Although they can prevent vehicle-related incidents, they do not provide any protection for laptops and are not relevant to the theft of portable electronic devices.