Which of the following statements will assign the first command-line argument sent into a Java program to a variable called argument?

a)```
argument = System.getFirstArgument();
```
b)```
argument = System.getArgument[1];
```
c)```
argument = System.getArgument[0];
```
d)```
argument = args[0];
```
e)```
argument = args[1];
```

d)```
argument = args[0];
```