Answer:
The main function of signal words or phrases as they are used to introduce outside evidence is to indicate that information is from a reliable source.Signal words or phrases are used to introduce evidence in academic writing. These words or phrases serve to provide a clue to the reader that the information provided is backed up by reliable sources. They provide evidence to support the argument made in the text and help readers understand how that evidence is relevant to the argument being made.Signal words or phrases are therefore important in academic writing as they indicate to readers that the information is coming from a credible source, making the argument more convincing and reliable. So, option C, "They indicate that information is from a reliable source," is the correct answer.
Step-by-step explanation: