Question 23

After she took her final exam, Kamryn put her chemistry books away for the summer, and she didn't open them again until September.

This option correctly combines two independent clauses using a conjunction, resulting in a grammatically accurate and coherent sentence.

A) After she took her final exam, Kamryn put her chemistry books away for the summer, and she didn't open them again until September.

This option is correct as it effectively combines two independent clauses with the conjunction "and." The first clause describes Kamryn's action of putting her books away, while the second clause indicates that she did not open them again until September, creating a clear and logical relationship between the two actions.

B) Kamryn didn't open them again until September after she took her final exam, she put her chemistry books away for the summer.

This option is incorrect because it improperly joins two independent clauses without a coordinating conjunction or appropriate punctuation, leading to a run-on sentence. The lack of a conjunction or a period makes the sentence grammatically flawed.

C) After her final exam, Kamryn put her chemistry books away for the summer because she didn't open them again until September.

This option is incorrect because it introduces a subordinate clause with "because," which changes the relationship between the ideas. While it is grammatically correct, it does not combine the clauses in the way the question asks, as it suggests a causal relationship rather than simply connecting two independent actions.

D) Kamryn put her chemistry books away for the summer after she took her final exam because she didn't open them again until September.

This option is also incorrect for similar reasons to Option C; it suggests a causal relationship by using "because." This makes it a complex sentence rather than the desired combination of two independent clauses, thus failing to meet the requirement of the question.

Conclusion

Option A is the only choice that properly combines two independent clauses using a conjunction, making it a grammatically correct and clear sentence. All other options either present grammatical errors or alter the intended relationship between the clauses, thereby not fulfilling the question's requirement.