How many lines of output will be displayed by the following program fragment?
```
for (i = 0; i < 5; i = i + 1)
for (j = 0; j < i; j = j + 1)
printf("%d %d\n", i, j);
```
a. 0
b. 5
c. 9
d. 10
e. 20
D
Computer Science & Information Technology
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