What is one of the two key driving behaviors the AAMVA CDL Manual says will help prevent a rollover in a combination vehicle?

AAMVA CDL Manual, Section 6.1.1 'Rollover Risks,' p. 6-1

Rollovers happen specifically when a driver turns too fast, not just from carrying heavy cargo, so slowing down at turns, ramps, and off-ramps is a concrete, controllable habit. This is an easy point to lose on the test if a driver assumes rollover prevention is only about how cargo is loaded.