Which of these best describes the operation of a continuously variable transmission (CVT)?

A continuously variable transmission (CVT) is designed to provide seamless and variable gear ratios, enabling the engine to run at an optimal speed for varying driving conditions. The correct answer accurately describes this operation, emphasizing that the CVT can adjust continuously through a range of effective gear ratios instead of being limited to specific fixed ratios. This capability allows for smoother acceleration and can significantly improve fuel efficiency since the engine can maintain ideal RPMs without the abrupt changes associated with traditional transmissions.

In contrast, a transmission that operates on fixed gear ratios would not leverage the unique advantages of a CVT. Having only two gear ratios does not represent the versatility and efficiency found in CVTs, eliminating the benefits of continuously varying gearing. Additionally, suggesting that a CVT always results in higher fuel consumption overlooks its design purpose, which is to enhance efficiency and performance under varying driving conditions. Therefore, stating that the CVT can continuously change gear ratios between maximum and minimum values accurately encapsulates its operational benefits.