Answer:
The correct option is;
C. They make text larger and bold
Step-by-step explanation:
The semantic reasons for using header tags which are the benefits users derive from including header tags in content published on the web includes;
1) They give structure to the writing included in the document
2) Header tabs allow text to be broken into sections with different content in focus
3) Header tags are used to add key words to a page
4) To boost search engine optimization SEO
5) To improve visibility.