Which sentence is closest in meaning to the following sentence :"While attempting to smuggle drugs into the country, the criminals were apprehended by custom officials."

Which sentence is closest in meaning to the following sentence :"While attempting to smuggle drugs into the country, the criminals were apprehended by custom officials."

• Attempting to smuggle drugs into the country, customs officials apprehended the criminals. (Incorrect)
• Criminals who were attempting to smuggle drugs into the country apprehended customs officials. (Incorrect)
• Customs officials apprehended the criminals who were attempting to smuggle drugs into the country. (Incorrect)
• Smuggling drugs into the country, customs officials attempted to apprehend the criminals. (Incorrect)
• Customs officials apprehended the criminals while smuggling drugs into the country. (Correct)