Which sentence uses the bold vocabulary word correctly?

a) Basketball is an especially interesting sport when it CATEGORIZES down to the finals.

b) Even though it took longer than expected, the city finally took a STANCE on the environmental pollution plaguing the area.

c) He EMPHAZIED the point on his paper by reducing the font and placing it the corner.

d) Please be careful to place your name in the HEADING at the bottom of the paper with the page number.