Client virtualization involves installing an application on a server and enabling multiple users to run the application simultaneously via virtualized sessions. This eliminates the need for individual installations on local machines.
* Why Not B (Software as a Service): SaaS delivers software over the internet and does not require local installations but is managed by a third party, not the organization itself.
* Why Not C (Sandboxing): Sandboxing is for isolating applications for security testing, not for concurrent user access.
* Why Not D (Embedded software): Embedded software is installed on hardware devices, not shared across multiple users.
CompTIA A+ Exam Reference: Core 1 (220-1101), Section 4.2, virtualization concepts.

The best option to help the administrator secure the corporate resources is B. Biometric scanner.
A biometric scanner is a device that can authenticate a user's identity based on their physical or behavioral characteristics, such as fingerprint, iris, face, voice, or signature. A biometric scanner can provide a high level of security and convenience for accessing corporate laptops, as it can prevent unauthorized users from accessing the devices and eliminate the need to remember passwords .
The other options are not the best options for this scenario. A Trusted Platform Module (TPM) is a chip that can store encryption keys and other sensitive data on a laptop. A TPM can enhance the security of data and devices, but it does not limit access to authorized users by itself. A TPM can work with a password or a biometric scanner to provide multifactor authentication . A laptop lock is a device that can physically secure a laptop to a desk or other object using a cable and a lock. A laptop lock can deter theft or tampering, but it does not prevent unauthorized users from accessing the laptop if they have the password or the key. Encryption is a process that can protect data on a laptop by transforming it into an unreadable format using a key. Encryption can prevent unauthorized users from accessing or modifying the data, but it does not prevent them from accessing the laptop itself.

TPM stands for Trusted Platform Module, which is a hardware component that securely stores encryption keys and other sensitive data12. TPM can be used to enable hard drive encryption, which is a technology that encrypts the data stored on a hard drive using sophisticated mathematical functions34. Hard drive encryption protects the data from unauthorized access in case the hard drive is lost, stolen, or tampered with.

Intermittent paper feeding issues in a laser printer are commonly caused by dirty or worn-out pickup rollers.
Cleaning the rollers can restore proper functionality. This aligns with the CompTIA A+ Core 1 objective related to troubleshooting and maintaining printers, specifically resolving paper feeding issues.

A custom hosts file is a file that maps hostnames to IP addresses, allowing the user to access websites or servers by their names instead of their numerical addresses. For example, a user can add a line like 192.168.1.100 myserver.local to their hosts file and then access the server by typing myserver.local in their browser. However, this method only works if the IP address of the server does not change. If the server is configured with a dynamic IP address, which means it can be assigned a different IP address by the network router or DHCP server, then the hosts file entry will become invalid and the user will not be able to connect to the server by its hostname. Therefore, the technician should ensure that the server is configured with a static IP address, which means it has a fixed and permanent IP address that does not change. This way, the hosts file entry will always point to the correct IP address of the server and the user will be able to ping the server hostname from their computer.
References:
How to Add a Local DNS Lookup to Hosts File - Help Desk Geek1
Set Custom Domain Name for localhost Website in IIS - TutorialsTeacher.com2 The Official CompTIA A+ Core 1 Student Guide (Exam 220-1101) eBook, page 4-9