Using the same amount of time and resources, Jack can assemble either 10 bikes or 5 computers, whereas Sam can assemble either 5 bikes or 5 computers. Based on the data, which of the following statements is correct? 
选项为:A:Sam has an absolute advantage in assembling bikes.  B:Sam has an absolute advantage in assembling computers.  C:Sam has a comparative advantage in assembling bikes.  D:Jack has a comparative advantage in assembling bikes.  E:Jack has a comparative advantage in assembling both bikes and computers.  请回答其中一个选项.