The paragraph is followed by an incomplete phrase or sentence which summarizes the main idea of the paragraph. Choose the missing words of the phrase or sentence.

A BMW is designed to bring confidence and joy to every moment you spend behind the wheel. Over the vast blanket of hard-packed snow and ice during the winter months, to respond with lightning accuracy in each of these situations may be impossible for a human driver, but not for a BMW equipped with All Season Traction.
Gua antee of （） for BMW drivers.