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.

jupiter is mainly composed of hydrogen and helium just like a star. spectral analysis of jupiter has revealed that in addition to hydrogen and helium, the planet is made of water, methane and ammonia. those elements are in trace amounts. the core of the planet is thought to contain some rock and metallic hydrogen. i hope this will give you the answer to your question! : d

answer; posthypnotic;