Which of the statements below will create the String r1 = "JAVA: How to Program"?
Consider the statements below:
```
String a = "JAVA: ";
String b = "How to ";
String c = "Program";
```
a. String r1 = c.concat(b.concat(a));
b. String r1 = a.concat(b.concat(c));
c. String r1 = b.concat(c.concat(a));
d. String r1 = c.concat(c.concat(b));
b. String r1 = a.concat(b.concat(c));
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