Write the constructor for the UserName class. The constructor initializes and fills possibleNames with possible user names based on the firstName and lastName parameters. The possible user names are obtained by concatenating lastName with different substrings of firstName. The substrings begin with the first character of firstName and the lengths of the substrings take on all values from 1 to the length of firstName.

the answer is d underlined.

storage maybe?

are there options?

answersecurity intrusion;

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