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Which option BEST STRENGTHENS the claim that 'switching to LED bulbs reduces electricity bills'?
ALED bulbs cost more than incandescent bulbs to manufacture
BHouseholds that fully switched to LEDs reported 30% lower lighting electricity costs in independent meter audits
CLED bulbs last longer than fluorescent bulbs
DMost retailers are now phasing out incandescent bulbs
ELED bulbs are available in many colour temperatures
Answer & Solution
Correct answer: B. Households that fully switched to LEDs reported 30% lower lighting electricity costs in independent meter audits
1. Identify what is being asked: this is a **Critical Reasoning Strengthen** question.
2. Apply the standard approach for this question type to evaluate each option.
3. The correct answer is **B. Households that fully switched to LEDs reported 30% lower lighting electricity costs in independent meter audits** — it satisfies the conditions of the stem.
_Source: GMAC Official 12 Sample Questions (mba.com)_
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