【单选题】oe is a tax accountant. He receives €100 per hour doing tax returns. He can type 10,000 characters per hour into spreadsheets. He can hire an assistant who types 2,500 characters per hour into spreads...
A.
none of these answers.
B.
Joe should hire the assistant as long as he pays the assistant less than €25 per hour.
C.
Joe should not hire an assistant because the assistant cannot type as fast as he.
D.
Joe should hire the assistant as long as he pays the assistant less than €100 per hour.