Choose a, b or c as the best answer. 3. The speaker seems to be concerned about the:

Question

BlackTom AI · Accepted Answer

Environmental consequences — lifecycle emissions, battery waste, and mining impacts — are emphasized in the speaker’s remarks, which makes option c the best choice.

1. Relevant knowledge points and concepts
- “Environmental consequences” covers lifecycle greenhouse‑gas emissions, pollution from electricity generation, battery raw‑material extraction (e.g., lithium, cobalt), and end‑of‑life disposal or recycling problems.
- “Economic sustainability” would focus on market viability, costs, subsidies, and industry profits.
- “Efficiency of future electric passenger vehicles” would focus on range, energy consumption per km, and technological improvements in motors or batteries.

2. Step‑by‑step reasoning
- Identify key words or themes used by the speaker. If the speaker mentions pollution, emissions, resource extraction, toxic waste, or recycling, these point to environmental concerns.
- Check whether the speaker instead discussed costs, profits, industry survival, or subsidies. If those were absent or secondary, economic sustainability (option a) is unlikely.
- Check whether the speaker discussed range, energy efficiency figures, battery kWh/100 km, or vehicle performance. If not, then efficiency (option b) is unlikely.

3. Intermediate “calculation” or textual analysis steps
- Map speaker phrases to categories:
  - Phrases like “harm to ecosystems,” “carbon footprint,” “battery waste” → environmental consequences (c).
  - Phrases like “will the industry survive” or “can companies make money” → economic sustainability (a).
  - Phrases like “miles per charge” or “improving motor efficiency” → vehicle efficiency (b).

4. Why the correct answer is correct
- The speaker’s concerns focus on environmental effects (raw‑material extraction, emissions from electricity generation, battery disposal), which directly match option c. These issues are about environmental impact, not market viability or technical efficiency.

5. Why the other options are incorrect
- Option a (economic sustainability) would be correct only if the speaker emphasized costs, market demand, profitability, or subsidies — none of which are the primary focus here.
- Option b (efficiency of future electric passenger vehicles) would be correct only if the speaker discussed technical performance like range or energy consumption; again, that is not the speaker’s main concern.

6. Conclusion
Therefore, the speaker seems to be concerned about the environmental consequences of electric cars; the correct answer is c, matching the provided answer.

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