Which of the Following DOES NOT Express a Valid Conclusion

Which of the following DOES NOT express a valid conclusion about the truthfulness of advertising?

A) One of the major complaints about advertising is that many ads are misleading.
B) National advertisers are likely to risk consumer trust and confidence by intentionally deceiving them.
C) Most advertisers do not intentionally mislead or deceive consumers, but some will test the limits of various rules and regulations to gain a competitive advantage.
D) It is difficult to determine what constitutes untruthful or misleading advertising since deception can occur in subtle ways.