The correct answer is C. Signal phrases should provide just enough information to show the reader that the source is a valid one that can be trusted
Explanation:
In texts, the purpose of signal phrases is to introduce a citation or show that the content was taken from an external source. This includes direct quotations, paraphrases, and summaries. These phrases are key to let the reader known not only that you are citing a source but that the source is valid and relevant to support your ideas, although these should provide just enough information to prove this. For example, in a text about physics you might include the signal phrase "According to the Nobel Prize-awarded physicist Albert Einstein,..." to introduce a quote from Einstein, this will show the reader not only that you are about to introduce a quote but that Einstein and the source cited is valid as he was an expert in the field. Thus, the statement that is true about signal phrases is "Signal phrases should provide just enough information to show the reader that the source is a valid one that can be trusted"
