The correct answer is D. trusting.
A credulous person is someone who is easily persuaded or deceived. They may be gullible or naive, and they may be easily taken advantage of. This can often lead them into trouble, as they may be more likely to believe things that are not true or to trust people who are not trustworthy.
The other options are not correct because they do not accurately describe a credulous person. A dreamy person is someone who is often lost in thought or who is easily distracted. A naughty person is someone who is disobedient or mischievous. An innocent person is someone who is not guilty of wrongdoing.
It is important to be aware of the dangers of being too trusting. It is important to be critical of what you hear and to be careful who you trust. If you are too trusting, you may be more likely to be taken advantage of.