In the article, the author states the theory of the plesiosaur is not logical: So from a purely logical stand point, the existence of such a large and ancient creature is unlikely.

How does the author imply that other theories besides the plesiosaur are most likely not true? Use evidence from the text to support your answer.
HURRY PLZ

explanation: the line "to save the day, harry must get past a scary three-headed guard dog" from the summary best justifies the conclusion that harry potter and the sorcerer’s stone was influenced by ancient greek mythological literature. the three other choices had nothing to do with ancient greek literature - and the words "three-headed guard dog" are what makes that choice the correct answer.

i had this before it is proper noun