Select from options: Continue writing the next sentence.

How to perform a trademark search
Conduct an informal search.
Trademarks may either be registered or unregistered. It is usually best to register a valuable trademark, but registration is not required in order to have legal rights over a trademark.

Pick from:
(A). If you register an intellectual property trademark, it needs to be soon. The process for filing an official trademark application will vary somewhat, but filing a " registration " type application is a process that often requires an accompanying fee.
(B). Trademark searches are usually done on an electronic or digital platform, like the trademark search database. In some countries, registration can only be done in certain european registries.
(C). In conducting an informal search on the internet, you are looking to see if the mark you wish to use is already in use as an unregistered mark in your field. It is important to remember that you may be held liable for trademark infringement if you use a mark that another entity is already using, even if that entity has not registered the mark.
(D). The independent trademark council (finra) has several databases online for you to work in. Visit the finra site at www.finets.com/workgroup/finra-trademark-trademark-search-database.
Answer:
(C).