How was Spencer challenged on his science of ethics?

How was Spencer challenged on his science of ethics?
 
  A) Detractors queried if morality was geared to the evolutionary process of nature, what would become of one's own moral responsibility and freedom.
  B) He had many supporters that did not question nature as an ethical foundation for morality.
  C) He was completely discredited by his detractors and never published again.
  D) He was challenged more on his belief in an unknown supernatural being than on his theory of ethics.
  E) Many took his theories as a branch of Darwinism to be further explored, whether or not they shared those ideas.