Given below are four jumbled sentences. Select the option that gives their correct order.

A. The elephant tusks were tracked from the Democratic Republic of Congo for two months.

B. Customs officials in Thailand say it's the biggest seizure in the country's history.

C. Four tonnes of ivory, with a market value of $6 million - it was an impressive haul.

D. Officials say they were being transported to Laos, from where they believed the ivory would be sold to customers across Asia.