Let's help our forum member answer this question:

"There is a approved change request. The baseline(s) and project management plan needs to be updated. Under which process they will be updated?

Direct & manage work or Monitor and control work. My understanding is Monitor and control process is the right choice."

"...How important do I think it is for new students to read the official PMP Handbook from PMI?  EXTREMELY!! Well, I had leveraged a STUDY PLAN based on what a colleague had suggested as template tailoring it to my specific needs modifying it as necessary throughout the classes and leading up to the ACTUAL Test (really, this is NOT a big deal; once you start; it became a routine).  With respect to my study plan, I had read and re-read BOTH the PMBoK and Rita’s book—TWICE, doing the practice exercises and re-doing them and reviewing them several times, going over my notes, committed to memory “the GRID” consisting of the 47 processes, teaming with my classmates—who wanted to succeed, taking several other tutorial classes (The PM Tutor) to fill in the gaps increasing my understanding of the interrelationships and correlations of the 47 processes.  Reading it ONCE does not do the reader justice, but it should be read laying the foundation of what is to come..."