What defines theft in legal terms?

The correct definition of theft in legal terms focuses on the element of unauthorized control over someone else's property through deception. This means that theft involves not just the acquisition of property, but also the intention to deceive the true owner. By emphasizing the aspect of "knowingly obtaining or exerting unauthorized control," this definition captures the essence of theft as both an unlawful act and an intent to deprive the owner of their property.

The other options do not align with the legal definition of theft. For instance, obtaining property with permission would not constitute theft, as there is no unauthorized control involved. Similarly, receiving stolen goods without knowing does not imply guilt in the same way because it lacks the knowledge of the underlying deception and illegal act. Lastly, taking property with the intention of returning it does not fit the definition of theft, as the intent to return indicates there is no intention to permanently deprive the owner of their property. Thus, option B accurately encapsulates the critical components that legally define theft.