The expression between the words If and Then is called a:

Connections to a pipe remain in effect after exec because

A. the array of open files is part of the process, not the program B. the parent adds the pipe to the environment

The Printer Event1         P1 requests and is allocated the printer R1.2         P1 releases the printer R1.3         P2 requests and is allocated the disk drive R2.4         P2 releases the disk R2.5         P3 requests and is allocated the plotter R3.6         P3 releases the plotter R3. Assume that the events in the accompanying narrative take place. Which of the following statements is true?

A. There is no deadlock. B. Event 4 caused deadlock. C. Event 5 caused deadlock. D. Event 6 caused deadlock.