Final answer:
Jericho is the first walled city in history, dating back to around 8500-7000 BCE with old walls and a significant tower indicating an advanced settlement with some form of governing system.
Step-by-step explanation:
Which of the following was the first walled city in history?
The first walled city in history was B. Jericho. This is evidenced by archaeological findings at the site of Jericho, which rise above the Jordan Valley. Remains such as stone tools date back to the early Neolithic era. The earliest settlement around the Ein as-Sultan spring dates to around 8500-7000 BCE, where archaeologists discovered remains of circular homes and, importantly, a large settlement protected by a stone wall and a ditch, suggesting that Jericho had some form of societal organization capable of such construction.
Jericho's old walls and the famed tower, estimated to have been built around 8000 BCE, are significant indicators of the city's early development. The existence of the wall and tower suggests that Jericho had a governing system, which would have been necessary to organize the labor for these large-scale constructions. The tower might have served various functions, such as defensive purposes, religious significance, or as an observatory, reflecting sophisticated community planning.
Contrasting Jericho with other historical sites, it stands out as an ancient walled city markedly older than other known walled cities, thus making it the likely answer among the given options.