Which of the Following Is the Best Example of a Stalling

Which of the following is the best example of a stalling objection?

A) "Your price is too high for the quality."
B) "Frankly, your competitor makes a more efficient refrigeration unit."
C) "You've got to do better than that with the price and financing."
D) "Sounds good! I'll need to clear it with my boss before I can make a purchase."
E) "I think you have a great product, but at this moment we don't need a new security system."