[ Compound and Complex, Conditionals ]
Which of the following is an example of a simple sentence?
A. The cats slept on the windowsill.
B. The cats slept on the windowsill, and the dog lay on the floor.
C. While the cats were sleeping on the windowsill, the dog lay on the floor.
D. The cat, which was orange and fluffy, slept on the windowsill.

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