Final answer:
The best-suited tool for Jennifer to perform memory analysis and forensics on Windows, macOS, and Linux systems is The Volatility Framework, as it supports all these platforms and is designed for memory forensics.
Step-by-step explanation:
Jennifer wants to perform memory analysis and forensics on Windows, macOS, and Linux systems. To meet her needs across these different operating systems, the best-suited tool is The Volatility Framework. This powerful open-source software is designed for memory forensics and supports analysis of memory dumps from all three operating systems Jennifer is interested in. The Volatility Framework provides a collection of tools for extracting digital artifacts and can help to identify malware, analyze system crashes, discover potential unauthorized system usage, and perform deep analysis of many aspects of system memory.