A. Solemn and majestic. Your welcome :)
a. solemn and majestic
The question refers to the painting Disputa, or The Disputation of the Sacrament. This was painted by the Italian artist Raphael, and is located in what is known as the Stanze di Raffaello in the Apostolic Palace in the Vatican. The painting shows a scene of heaven and earth, in which we are able to see Christ, the Virgin Mary, John the Baptist, Peter, Adam, Paul, Moses and other biblical figures. The mood created by the painting is a solemn and majestic one.