"intended to protect journalists from legal challenges to their freedom to report the news."

Shield laws

Explanation:

Shield laws are intended to protect journalists from legal challenges.

This law gives reporter protection against the force to disclose confidential information or source of the information.

In 1972 supreme court discussed the case whether the reporter should give there report of the source of their confidential information or not. Then they come up with this law which will protect the confidentiality of the information source.

answer; /// i believe its (slavery) to be the correct check luck.

i would say b. research typically uses a variety of sources