Sasol is considering expanding its operations to the US to pursue sustainable growth. It is analyzing whether to build an ethane cracker plant or gas-to-liquids (GTL) plant. The document presents a decision tree analysis comparing the two options. A financial analysis shows the ethane cracker has a lower capital cost but higher net present value than GTL. However, GTL has a shorter payback period. A sensitivity analysis shows the ethane cracker's NPV remains higher even if feedstock prices and costs change. Potential risks for each project are also considered.