All of the following are conditions for fraud except

Digital signatures are used for which of the following?

A) To encrypt a message B) To ensure message confidentiality C) To prove the identity of the sender of the message D) To ensure the message cannot be opened by anyone but the sender

What is the output of the following code? ? queueType queue; int x, y; ? x = 2; y = 6; queue.addQueue(x); queue.addQueue(y); x = queue.front(); queue.deleteQueue(); queue.addQueue(x + 2); queue.addQueue(x); queue.addQueue(y - 3); ? while (!queue.isEmptyQueue()) {    cout << queue.front() << " ";    queue.deleteQueue(); } cout << endl ?

A. 6 2 3 3 B. 6 2 4 2 C. 6 3 3 3 D. 6 4 2 3