Which of the following will be true after these lines are executed?

Consider the following snippet of code:
```
Random generator = new Random();
int randNum = generator.nextInt(20) + 1;
```

a) randNum will hold a number between 1 and 20 inclusive.
b) randNum will hold a number between 0 and 20 inclusive.
c) randNum will hold a number between 1 and 21 inclusive.
d) these lines will not be executed because a compiler error will result.
e) none of the above

a) randNum will hold a number between 1 and 20 inclusive.