The correct answer is the last option.
To credit a source means to ACKNOWLEDGE WHERE YOU FOUND A SOURCE. In order to avoid plagiarism, the writer has to cite the sources where he found information, being the most common citation formats APA or MLA. The citation style to use will depend on the topic to discuss in the paper.
Two things. Wave in water or wave with a hand.
Can you at least put a picture or write some of the paragraphs that showed a bit of the grandmothers opinion about there vacation that would help me and answer that question that your stuck on.
Epi is epigastric is a prefix