What Is the Main Purpose for Using Metal-Ions as Catalysts

What is the main purpose for using metal-ions as catalysts in the following hydrolysis reaction?

A) increases the rate by making water a stronger base,thereby increasing its electrophilicity
B) increases the rate by making water a stronger base,thereby increasing its nucleophilicity
C) increases the rate by making water a stronger acid,thereby increasing its nucleophilicity
D) increases the rate by making water a stronger acid,thereby increasing its electrophilicity
E) increases the rate by making water a stronger acid,thereby decreasing its nucleophilicity