Which of the Following Best Defines the Term Dilution

Which of the following best defines the term dilution?

A) Loss in existing shareholders' value, in terms of either ownership, market value, book value, or EPS.
B) One underwriter buys securities from an issuing firm and sells them directly to a small number of investors.
C) Underwriter buys the entire issue, assuming full financial responsibility for any unsold shares.
D) Period when stock is selling without a recently declared right, normally beginning two business days before the holder-of-record date.
E) The type of underwriting in which the offer price is set based on competitive bidding by investors. Also known as a uniform price auction.