Step 1: Analyze the sentence.
The sentence compares India's population growth to that of other countries while also discussing the relative economic standing. The structure must present the comparison logically.
Step 2: Analysis of options.
- (A) China, Brazil, or Russia, with the economy having remained: Correct. This option correctly links India's population growth and economic comparison with the other countries.
- (B) has those of China, Brazil, or Russia, and the economy remaining: This option is awkward and does not maintain the intended meaning of the comparison.
- (C) the Chinese, the Brazilian, or the Russian economy having remained: This structure creates unnecessary complexity and is grammatically incorrect.
- (D) Compared to many of his peers' opinions that lasers were relatively simple: This does not relate to the intended comparison of population growth and economic standing.
- (E) Even with many of his peers convinced of lasers being relatively simple: This is unrelated to the sentence's meaning.
Step 3: Conclusion.
The correct answer is (A), as it properly conveys the intended comparison and maintains clarity in the sentence.