Answer the following question: Read the following article and select the best answer. Article: Good morning! I am an English boy. My name is Frank Smith. My telephone number is 451-3175.My pen is blue, and my ruler is white. The girl is Grace Brown. Grace is a nice girl. Her telephone number is 535-9861. Her pen is black, and her ruler is red. Grace and I both like numbers. Numbers are interesting. Question: What color is Grace's pen? - Blue. - Black. - White. - Red.
Answer:
Black.