“The Black Cat" is the more complex story of the two. The murder is unpremeditated, whereas in "The Tell-Tale Heart," it is carefully planned. Additionally, the narrator in "The Black Cat" is an alcoholic, committing his acts of violence against both the cat and his wife under the influence of alcohol.
Newspapers and television can be the most biased, because are influenced by owners and journalists personal view. Things can only be published/said with someone's approval, so can be directed to one's point of view.
Internet is the least biased, because its content come from multiple sources. But depending on the source, also can be wrong, or not be reliable.
The last option. There needs to be an apostrophe in "its".