In the sentence, she is an eight year old girl, eight year old girl should be hyphenated

eight-year old girl
eight-year-old girl
eight-year-old-girl
none of the above

Which statement best describes the motivation of the character pahom in leo tolstoy's story "how much land does a man need? " a. pahom wished for just enough to improve his family's quality of life. b. pahom wanted more land for himself so he could feel secure. c. pahom wanted to his wife, who was never satisfied. d. pahom wanted to gain land to avoid having neighbors.