What is the precondition of the following algorithm?Algorithm fillQueues (q0to9, q10to19, q20to29, qOver29)This algorithm reads data from the keyboard and places them in one of four queues).Post queues filled with data1 loop (not end of data) 1 read (number) 2 if (number < 10) 1 enqueue (q0to9, number) 3 elseif (number < 20) 1 enqueue (q10to19, number) 4 elseif (number < 30) 1 enqueue (q20to29, number) 5 else 1 enqueue (qOver29, number) 6 end if2 end loopend fillQueues
A. all four queues have been created
B. none of the queues have been created
C. none of the queues is empty
D. q0to9 is empty
Answer: A
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