The answer:
Research Purposes. Transuranium elements present a high radioactive level, which makes them unstable and extremely expensive, Some of them have only been seen in laboratories and used to create weapons. A small section of the list of transuranium elements can be used in machines, but the majority of these elements have only been discovered, seen and used in laboratories.
Incorrect answer:
Industrial use. Being unstable and expensive, these elements are not a viable industrial supply, besides being redioactive, they could be considered dangerous, many of them exist in small quantities in laboratories, which makes them inaccessible to be used in mass production.
Incorrect answer:
Commercial use. Along with the previous answer, the commercial use of this material could in many cases be considered illegal and extremely dangerous, it is not a material that people could acquire in big quantities or for personal use, many laboratories are still studying these elements.
An example signal statement is: A signal statement is something that is told to aware the listener regarding the following statement.
