Analyst Testing Interview Question:

0 program Calculate Commission
1 total, number : integer
2 commission_hi, commission_lo : real
3 begin
4 read ( number )
5 while number ≠ -1 loop
6 total = total + number
7 read ( number )
8 endloop
9 if total > 1000 then
10 commission_hi = 100 + 0.2 * ( total - 1000 )
11 else
12 commission_lo = 0.15 * total
13 endif
14 write ( "This salesman's commission is:")
15 write ( commission_hi )
16 end program Calculate Commission
Which of the following correctly lists data flow anomalies that exist in the 'calculate commission' program?
A. total: line 6; commission_lo: line 12; commision_hi: line 15
B. commision_hi: line 10; commission_lo: line 12
C. number: line 5; number: line 6
D. total: line 6; commision_hi: line 10; commission_lo: line 12