Concept:Choose the word that best fits the context of a crime committed on the sea.
Explanation:The sentence says the cargo was intercepted on sea, which means it was stopped and seized while travelling by water.
"Pirates" are criminals who attack and rob ships at sea, so this is the most suitable word.
"Thieves" and "robbers" can steal on land, but they are not specifically connected to sea travel.
"Terrorists" usually act for political reasons, not for stealing cargo.
Thus, the context of the sea makes "pirates" the correct choice.
Answer:A. pirates