Maneuvers, priority, and road position
Maneuvers never create priority
When you turn, change lanes, or join traffic, you must give way to traffic that is already moving.
What to watch for
The question mentions a lane change, turn, reverse, or joining traffic.
The rule
The rule explains exactly how to answer any question of this type — and why the obvious wrong answer fails.
See the rule →Common trap
Don't think signalling or going slowly gives you priority.