Topic: Miscellaneous (Others Question of English Grammer),

Best Answer Explained in Below-:

The correct answer to the sentence "The detectives ___ the suspect for nearly ten hours before finally letting him go" is option D) interrogated.

The context of the sentence indicates that the detectives were engaged in a prolonged questioning session with the suspect. The term "interrogated" specifically refers to a systematic and often intense questioning aimed at eliciting information, typically used in police investigations. This aligns with the scenario presented—detectives working diligently to gather insights or confessions from a suspect.

In contrast, while "arrested" (Option A) implies that the suspect was taken into custody, it does not convey the act of questioning. "Tortured" (Option B) suggests the use of physical harm or severe coercion, which is not only ethically and legally objectionable but also does not fit a professional investigative context without serious repercussions. "Investigate" (Option C) is a general term that encompasses a broader range of activities and is not specific to questioning a person, making it unsuitable in this context.

Therefore, "interrogated" correctly captures the essence of what detectives would be doing in this scenario, emphasizing their focus on extracting information from the suspect during the extended time period.