Assertive people have all of the following attributes except:

a.

self-respect
b.

respect for others
c.

high self-esteem
d.

superior attitude

Assertive people would have all of these attributed except having respect for others - C. 

Although even this answer perhaps couldn't be considered true because assertive people can have a positive attitude and respect towards other people it's just that in their case they respect themselves more and have a more positive view of themselves as well.