Window Concepts Has Introduced a New Line of Windows That

Window Concepts has introduced a new line of windows that offer the same benefits as solar panels in reducing heating and cooling costs in homes. The state-of-the-art windows will also contribute to the slowing of global warming while providing energy reliability. The company sends a team of representatives to the National Doors and Windows Trade Show to promote the new line of windows. Which promotion mix tool has Window
Concepts used in this scenario?

A) public relations
B) crowdsourcing
C) crowdcasting
D) personal selling
E) advertising