Evidence that a source is authoritative includes a. an email address to ask further questions about information in the source c. no verbiage used which could identify bias about the information provided b. a date regarding when the source was written d. logical structure of the information provided so that it is easily read and understood

It think the answer is A.

I hope this helps :)

The answer is: A. an email address to ask further questions about information in the source  

When writers of a certain article willing to put their personal information on their source, it indicates that the writers are willing to take responsibility regarding the piece that they just wrote.

Since they risk public attack/humiliation due to this sharing of personal information, it indicate to a certain extend that the author has a certain level of experience/expertise in the topic.

c. taught scientists many new things about the earth, but not other planets.

explanation:

answer: musical connotation

leonard b. meyer (1918-2007) was an american composer, author and philosopher. his work emotion and meaning in music is perhaps the first major treatise on music. it is a philosophical and psychological work, greatly influenced by koffka (one of the major proponents of gestalt psychology). his work deals with the problem of musical meaning and musical communication.