The correct answer is: A. serif fonts
Serif fonts are fonts that have small lines, called serifs, at the ends of the main strokes of each letter. Serif fonts are often considered to be more traditional and formal than sans serif fonts. They are also often considered to be easier to read, especially at smaller sizes.
Sans serif fonts are fonts that do not have serifs. Sans serif fonts are often considered to be more modern and informal than serif fonts. They are also often considered to be easier to read on screens, as they do not have small details that can be difficult to see at low resolutions.
Text fonts are fonts that are designed for body text. Text fonts are typically easy to read and have a consistent appearance. They are often used for long passages of text, such as articles or books.
Picture fonts are fonts that are designed to look like images. Picture fonts are often used for decorative purposes, such as in logos or website headers. They can be difficult to read, as they are not designed for body text.
In conclusion, serif fonts are the best type of font for titles and headlines. Serif fonts are traditional, formal, and easy to read.