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Set 4: Cross-Text Connections

Explanation

Answer: A

PASSAGE

Text 1 Cryptocurrency relies on blockchain technology, a decentralized ledger. To validate transactions, computers solve complex puzzles in a process called 'mining,' which secures the network. Text 2 Proof-of-Work mining is incredibly energy-intensive. The Bitcoin network consumes more electricity annually than some entire countries. This environmental cost has led to the development of 'Proof-of-Stake' alternatives.

What problem with the mechanism in Text 1 drives the innovation described in Text 2?

A. The unsustainable energy consumption of the mining process.✓ Correct
B. The puzzles are too easy.
C. The network is not secure.
D. Computers are too expensive.

Detailed Explanation

Text 1: Mining secures. Text 2: Energy intensive/Cost -> Proof-of-Stake. Driver: Energy consumption.

Key Evidence:

• "incredibly energy-intensive"

• "environmental cost"

Why others are wrong: B (Complex puzzles.), C (Secures network.), D (Energy cost.).

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