Everyone admired his ideas on this issue.

Answer: Option D

Admired : regard with respect or warm approval.
Disappointed : sad or displeased because someone or something has failed to fulfil one's hopes or expectations.
Discarded : get rid of (someone or something) as no longer useful or desirable.
Neglected : suffering a lack of proper care.
Disapproved : have or express an unfavourable opinion.

Antonym of Admired is Disapproved