Despite being labeled as $$decentralized$,$ the networks for many leading cryptocurrencies such as Bitcoin and Ethereum are ironically quite centralized. What does this mean? Please select all that apply.

Select all the answers you think are correct.

A$.$The decision$-$making power is concentrated into a handful of individuals

B$.$Mining activities are concentrated into large mining centers and$/$or pools

C$.$Supply of hardware & equipment is concentrated in a few manufacturers

D$.$The users of these blockchains are concentrated in a few geographic regions