Mia did a study for a health class about the effects of the length of a person's foot and their shoe size. based on a graph of her data, she found that there was a relationship between the length of a person's foot and their shoe size. which of the following is a valid conclusion? a. the length of a person's foot is a cause of their shoe size, which implies that there is also a correlation between the length of a person's foot and their shoe size. b. there is no correlation between a person's shoe size and the length of their foot. c. a person's shoe size is a cause of the length of their foot. d. no conclusion can be drawn about the correlation or causation between a person's shoe size and the length of their foot.