What do interest groups, such as texans for public justice, use to provide current information to the public?
a. websites with information about a topic of interest
b. library of congress records
c. archival census data about people's views
d. open records data of politician's tax return information

Interest groups are not typically formal, and they are not integrated in the government in any way, so they are not responsible for example for providing Congress records.

They can, out of their own initiative, provide information for example on their websites,  but they don't represent the government.

So the correct answer is a)