What he said is well worth _____.

A
worth doing sth.
她的意见值得我考虑,考虑这个动作是我自己做出的,不用被动语态,B排除

A. considering 是对的。

sth be worth doing,某物值得做，固定短语。
除了worth之外，其它形容词的这种句式通常用to do，如：The book is interesting to read . / The cloth is easy to wash.

选 A considering
be well worth doing 非常值得做...
这里的doing要用主动表被动，所以还是用considering
若是以下情况就对: what he said is worthy of being considered.
It is worthwhile to consider what he said.