Passage Summary: In older planes, pilots could see what their partner was doing just by looking at the controls, but in newer planes, they have to talk more because those visual cues are gone.

Reasoning: Newer airplane designs make it harder for crew members to see each other's control changes, which has forced them to rely on verbal communication more frequently to maintain safety checks.

Analysis: This set of facts describes a shift in how information is shared in a cockpit. We are told that a 'routine' visual method of cross-checking was eliminated, leading to a 'much more frequent' need for verbal communication. The most strongly supported inference will likely connect these two facts. For example, it is highly likely that the increase in verbal communication is intended to compensate for the loss of the visual cross-checks that were once automatic.