What assistance does the Lenovo Service YouTube channel provide to customers?

The Lenovo Service YouTube channel primarily provides resources and guidance for customers on performing Customer Replaceable Unit (CRU) replacements. This content is designed to empower users by offering step-by-step instructions and visual demonstrations that clarify how to safely and effectively replace parts like batteries, hard drives, and memory modules in Lenovo devices. By focusing on CRU replacements, the channel helps enhance user knowledge and confidence in managing their equipment, directly addressing the needs of customers who may need assistance with upgrades or repairs.

The emphasis on CRU replacements is particularly important for Lenovo's customer service philosophy, which encourages users to take a proactive role in maintaining their devices. While debugging software issues, enhancing security, and optimizing system performance are essential aspects of customer support, they are not the primary focus of the YouTube channel's content. Instead, the channel centers on practical, tangible tasks that users can undertake to improve their devices, making option B the most fitting answer.