Regarding De Facto Standards, a "Tipping Point" Is When

Multiple Choice

Regarding de facto standards, a "tipping point" is when

A) a certain threshold of market share is reached, beyond which it just keeps rising irreversibly.
B) the market losers basically have to "tip" their excess product away.
C) it's as though the market losers "tip" their market shares into the winners bag.
D) customers finally realise who has the best product.