Which action is legal and not a violation of license law?

Placing a "For Sale" sign in front of a house with the seller's permission is a standard and legal practice in real estate transactions. It is a common method to publicly indicate that a property is for sale and to attract potential buyers. This action is typically part of a listing agreement between the seller and the real estate agent and is seen as a necessary step in marketing the property.

In the context of real estate laws, ensuring that such actions are conducted with the consent of the property owner respects the rights of the seller and complies with local regulations regarding property signage. Proper permissions safeguard against potential disputes and uphold the ethical standards expected in real estate practices.

The other options involve actions that are either unethical or illegal, such as discrimination based on religion, failing to disclose full information in advertising, and distributing misleading information, all of which can lead to severe consequences under license law.