Final answer:
The sin of the people in the Tower of Babel narrative was pride and disobedience, as they attempted to build a tower to the heavens and defy divine authority.
Step-by-step explanation:
The sin of the people in the account of the Tower of Babel was B. Pride and disobedience. The story reflects a time when humanity, speaking a single language, came together to build a city and a tower tall enough to reach the heavens. This act of hubris, or extreme pride, was seen as an attempt to equal God, which led to God confusing their language and scattering them across the earth. The narrative underpins themes of arrogance and the defiance of divine authority, rather than theft, idolatry or murder.