What markup techniques can help make tabular data more accessible to people who are blind?

What will be an ideal response?

a. Distinguish between header cells and data cells by using and
b. Use the “id” and “header” attributes to associate column labels with their data.
c. For more complex tables, use the “axis” attribute and the expanded form of the “header” attribute to designate additional associations beyond that implied by the row and column labels.