Select an Appropriate Expression to Complete the Following Method, Which

question 8

Multiple Choice

Select an appropriate expression to complete the following method, which is designed to return the number of elements in the parameter array numbers. If a value appears more than once, it should be counted exactly once. public static int countElementsOnce(int[] numbers)
{
Set<Integer> values = new HashSet<Integer>() ;
For (int num: numbers)
{
Values.add(num) ;
}
______________________
}

• A) return numbers.length;
• B) return values.length();
• C) return values.size();
• D) return numbers.length - values.size();

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The process of systematically investigating and studying materials and sources to establish facts and reach new conclusions.

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