Which of the following sentences, if added here, would best strengthen the tone of the essay while providing a transition into the next paragraph?
A. I once sat on the bank of a small creek for nearly an entire day; I became so absorbed in my own musings that I completely lost all track of time.
B. I sometimes speculate about how much my surroundings have changed over time. Did a native person sit on this same boulder watching the sunrise, much like I am today?
C. I often find the sights around me to be the most thought provoking. A single autumn leaf changing from green to crimson inspires awe and wonder in me.
D. In silence, I ponder the natural system at play, and in occasional moments of lucidity, words pour from my brain to my hand to my notepad.