The van't Hoff factor of $CH_3COOH$ is less than unity. It indicates that the acetic acid

Question

$\begin{array}{1 1}(a)\;\text{associates}\\(b)\;\text{dissociates}\\(c)\;\text{either dissociates or associates}\\(d)\;\text{We cannot say anything based on Van't Hoff factor}\end{array}$