Let's match the fragments to known international agreements: - Statement 4: "1985 ... treaty ... Vienna convention ..." refers to the Vienna Convention for the Protection of the Ozone Layer, adopted in 1985. This is accurate. - Statement 3: "1987 ... agreement ... against ..." likely refers to the Montreal Protocol on Substances that Deplete the Ozone Layer, adopted in 1987. This protocol is an agreement against the use of ozone-depleting substances, fitting the description. This is accurate. - Statement 2: "1989 ... treaty ... definition/explanation ..." could refer to several treaties from 1989. A significant one is the Basel Convention on the Control of Transboundary Movements of Hazardous Wastes and Their Disposal, adopted in 1989, which involves definitions and control measures. This is a plausible match. - Statement 1: "UN ... (ocean) ... 2008 ... related to climate change ..." is vague, but plausible. The UN General Assembly discussed oceans and climate change extensively. For instance, UNGA Resolution A/RES/63/111 on Oceans and the Law of the Sea in 2008 addressed various issues including the impact of climate change on oceans. There were also ongoing discussions within the UNFCCC framework (COP 14 in 2008) about climate impacts on ecosystems, including marine environments, and potential mitigation/adaptation strategies involving oceans. It's reasonable to assume this refers to a correct UN-led initiative, report, or discussion from 2008.Given that statements 2, 3, and 4 strongly match major environmental treaties and all options include 2 and 3, and option D includes 4, it is most probable that statement 1 is also intended to be a correct reference to a UN activity related to oceans and climate change in 2008. Therefore, all four statements are likely correct in the context of the original question.