Among the following options that do not belong to the CSS text attribute is ()

Text conversion: text conversion; the default is none; you can choose uppercase | uppercase | lowercase.

Text-align: text alignment mode, optional start (alignment start boundary) | end (alignment end boundary) | left (alignment left) | right (alignment center) | justify (alignment both ends) | match-parent | justify-all, which are css3 attributes except left, middle and right alignment.

Line height: Line height. . Normal value |

The answer is a, because it is a font attribute.