An advertisement for a leading racquet manufacturer made the following claim: The last five Wimbledon mens single champions have all changed to Heads new tennis rackets the only racket that uses genuine nano technology in its frame. In that case, isnt now the time to add power to your tennis strokes and to trade in your old racket for a Head?

Question: Frames strengthened by nano-technology are used only in Heads new rackets.
Options:
A. true, B. false, C. uncertain
Answer: "B"