The quote that best explains the differences between each congressional chamber's approach to the legislative process is:
C. “Every house may determine the rules of its proceedings.”
This quote highlights the autonomy each chamber (the House of Representatives and the Senate) has in establishing its own rules and procedures for how it conducts business, including the legislative process. The House and Senate have different structures, sizes, and traditions that influence their respective legislative approaches, and this quote underscores that distinction.