GKFix MCQ Question

Why does the ionic character decrease from MF to MI for halides of a monovalent metal M?

• A. The atomic size of the halogens decreases from F to I.
• B. The electronegativity difference between M and the halogen decreases from F to I.
• C. The metallic character of M increases.
• D. The bond length decreases from MF to MI.