The four sentences $( \text{labelled} \; 1, 2, 3$ and $4)$ below, when properly sequenced would yield a coherent paragraph. Decide on the proper sequencing of the order of the sentences and key in the sequence of the four numbers as your answer:
- The $\text{US}$ has long maintained that the Northwest Passage is an international strait through which its commercial and military vessels have the right to pass without seeking Canada’s permission.
- Canada, which officially acquired the group of islands forming the Northwest Passage in $1880,$ claims sovereignty over all the shipping routes through the Passage.
- The dispute could be transitory, however, as scientists speculate that the entire Arctic Ocean will soon be ice-free in summer, so ship owners will not have to ask for permission to sail through any of the Northwest Passage routes.
- The $\text{US}$ and Canada have never legally settled the question of access through the Passage, but have an agreement whereby the $\text{US}$ needs to seek Canada’s consent for any transit.