Five jumbled up sentences, related to a topic, are given below. Four of them can be put together to form a coherent paragraph. Identify the odd one out and key in the number of the sentence as your answer:
- The legal status of resources mined in space remains ambiguous; and while the market for asteroid minerals is currently nonexistent, this is likely to change as technical hurdles diminish.
- Outer space is a commons, and all of it is open for exploration, however, space law developed in the $1950 \text{s}$ and $60 \text{s}$ is state-centric and arguably ill-suited to a commercial future.
- Laws adopted by the $\text{US}$ and Luxembourg are first steps, but they only protect firms from competing claims by their compatriots; a Chinese company will not be bound by $\text{US}$ law.
- Critics say the $\text{US}$ is conferring rights that it has no authority to confer; Russia in particular has condemned this, citing this $\text{US’}$ disrespect for international law.
- At issue now is commercial activity, as private firms–rather than nation states–look to space for profit.