Select the best answer for the question.
6. Which of the following is a simple sentence?
A. The Great Pyramids of Giza and the Taj Mahal in India show the beauty and longevity of great architecture.
B. The Coliseum in Rome is the structure that used to host gladiatorial combats.
O C. I'm hungry, so you need to cook.
D. Be sure to visit the Louvre if you ever travel to Paris.