Some Good Did Come from the Internet Bubble of the Late

Some good did come from the Internet bubble of the late 1990s.One good thing was that:

A) People learned they should not invest in dotcom companies.
B) Start-up companies found they could bypass venture capitalists and raise funds directly from the capital markets.
C) Stock market bubbles do not have to result in an inefficient allocation of resources.
D) The theory of efficient markets doesn't always hold and consistently better-than-market returns are achievable.