Which of the following are true about Bitcoin miners?
| Bitcoin miners can more efficiently mine for blocks by specifically targeting parts of the nonce search space that have more puzzle solutions | Wrong |
| The target hash has become so small that the block header nonce alone isnt generally large enough to allow miners so search enough of the hash output space to find a valid block | Correct |
| The mining difficulty is recomputed roughly every 2 weeks to keep the proof-of-work puzzle difficult | Correct |
| Over a 2 week period, the average time to mine a block is always 10 minutes | Wrong |
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