To Help a Screen Reader Know Which Header Cell a Data

To help a screen reader know which header cell a data cell is associated with:

A) use the th element's data attribute with a value that matches the associated data cell's id value.
B) use the td element's headers attribute with a value that matches the associated header cell's id value.
C) apply a header: heading-cell-id CSS rule to the data cell where the heading-cell-id value matches the associated header cell's id value.