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Suppose s1 and s2 are two strings. Which of the following statements or expressions is(are) incorrect? A. String s3 = s1 + s2 + 1;

Suppose s1 and s2 are two strings. Which of the following statements or expressions is(are) incorrect?

A. String s3 = s1 + s2 + 1;

B. int i = s1.length() - 5;

C. String s = new String("Yet another string");

D. String s3 = (String)(s1 == s2);

E. s1 == s2

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