Select all that apply $[$point deduction on every wrong selection, partial point on every correct selection$]$:

What is Proof$-$of$-$Work? What makes this consensus algorithm capable of resisting attackers?

Group of answer choices

The key idea behind Proof$-$of$-$Work is that we approximate the selection of a random node by selecting nodes in proportion to how many coins we own that we hope that nobody can monopolize.$$

A proof$-$of$-$work system requires fast computers that use large amounts of energy resources.

The key idea behind Proof$-$of$-$Work is that we approximate the selection of a random node by selecting nodes in proportion to a resource that we hope that nobody can monopolize.

Make it moderately hard to create new identities to prevent Sybil attack. Attacks infeasible if majority of miners weighted by hash power follow the protocol.