. . . . . . . . more you earn, . . . . . . . . more you can spend.

Solution (By Examveda Team)

Definition:
This sentence follows a comparative correlative structure, which is used to show a direct relationship between two variables. The correct structure for this type of sentence is "The + comparative adjective, the + comparative adjective". Correct Answer:
The correct option is Option C: The, the. Explanation:
- The phrase "The more you earn, the more you can spend" expresses a direct proportional relationship: as one factor increases, the other also increases.
- This is a common English construction where "The + comparative adjective/adverb, the + comparative adjective/adverb" is used to show that one change causes another.
- The correct sentence is: The more you earn, the more you can spend.
Why Other Options Are Incorrect:
- Option A: So, as → Incorrect because "so" and "as" do not form a comparative correlative structure.
- Option B: As, as → Incorrect because "as... as" is used for comparisons of equality (e.g., "He is as tall as his brother"), which does not fit the sentence's meaning.
- Option D: If, than → Incorrect because "if" introduces a condition, and "than" is used for direct comparisons, making the sentence grammatically incorrect.
Final Answer: Option C: The, the.