With Respect to Fonts and Colors While Designing a Homepage,one

With respect to fonts and colors while designing a homepage,one should:

A) use a font size for the main content which is larger than the default size.
B) avoid using contrasting colors if a colored background is used.
C) use cross-platform fonts so that users see text similar to the page design.
D) use title cases for headings so that they are easily identifiable.