There are the usual kinds of crowd-controlling abilities in Diablo III: Stunning, rooting, snaring, charm, hex, fear etc.
It appears like some monsters are less affected by them than others. It seems, however, that even bosses can be, for example, frozen.
How exactly do CCs work? Do they have diminishing returns, like in WoW? Are all bosses equally CCable? Is CC efficiency or chance of successful CCing in any way dependant on any attribute (e.g. chance to fear enemies)?
The answer of this question will have some important implications for boss-fights in general, but especially for groups. If there are, for example, no diminishing returns on stuns, then four-player parties could easily specialize in stunning-equipment and skills to kill a boss without the boss hitting anyone even once.
Some monsters also have crowd-controlling abilities. What stats prevent me from being CCed (stunned, feared, snared, etc.) by enemies?