听一段材料，回答下面几个小题。
When did Jones have to work?
A. In 1948.
B. In 1971.
C. In 1979.
What did Jones study in the University of Pennsylvania?
A. Math.
B. Construction.
C. Computer.
How old was Joe Jones when he completed the work on his master's degree?
A. 48.
B. 55.
C. 65.