If the Correlation Between the Physical Weight and Reading Ability

If the correlation between the physical weight and reading ability of children is -1.00, this would indicate that

A) there is very little statistical relationship between weight and reading ability among children.
B) low body weight has a negative effect on the reading abilities of children.
C) better reading ability is associated with lower physical weight among children.
D) body weight has no causal influence on the reading abilities of children.