When Does a Modifiable Areal Unit Problem Occur

When does a modifiable areal unit problem occur?

A) When a map displays colors, shades, or patterns in accordance with category values of underlying data.
B) When an organization uses GIS to achieve their goals and objectives or to obtain a competitive advantage.
C) When point based spatial data are aggregated into regions and the results depend on how the regions are defined.
D) When GIS sites have multiple users whose analyses can be invalidated by incorrect or unexpected data imports.