SpaceX got access to LC-13, a former Atlas launch pad, to convert to LZ-1 (Landing Zone 1) for landing Falcon 9 first stages.
What considerations went into the decision on using LC-13?
Clearly the Cape Canaveral folk were involved in deciding which pad was safest. SpaceX obviously had requirements in mind.
I initially thought it would be the furthest south, and thus furthest away from LC-39A/B (Old Shuttle pads, now SpaceX LC-39A and 39B multipurpose/SLS), the VAB, LC-41 (Atlas 5 pad), LC-40 (SpaceX pad), and all the active infrastructure.
But looking at this map, it is clear that there are many more further south options in Missile Row.