单选题
You are now the proud owner of a Dustfree vacuum cleaner.
This product will provide you with years of ______ service and quality
performance. We offer you a lifetime guarantee ______ any defects in material
and workmanship. If you do experience any of these problems
with your product we will fix the machine at no cost to you or we will provide
you with a new product at no additional charge. Please visit our Web site and
give us your mailing address and a short description of the problem. We will
then have a service representative ______ the cleaner at your convenience.
However, we do not cover willful or accidental damages.