According to the text, privacy advocates

a) are quite happy about Google’s decision to keep search logs intact indefinitely.

b) have influenced Google’s decision to make search logs anonymous right away.

c) are unanimous in their belief that Web search companies should not keep search records at all.

d) praised Google’s decision to resist a subpoena to disclose a large amount of search data.

e) have agreed that search records should only be used to improve a company’s search engine or any other service.