The correct answer is A. Analytical Engine.
The Analytical Engine was a mechanical computer designed by Charles Babbage in the 19th century. It was the first computer to be designed with all the key features of modern computers, including a central processing unit, memory, and input/output devices. Babbage never built a working model of the Analytical Engine, but his work laid the foundation for the development of modern computers.
The Arithmetic Machine was a mechanical calculator designed by Blaise Pascal in the 17th century. It was the first machine to be able to perform all four basic arithmetic operations (addition, subtraction, multiplication, and division).
Donald Knuth is an American computer scientist who is considered to be one of the most influential figures in the field of computer science. He is best known for his work on the development of the TeX typesetting system and the METAFONT font creation system.
The answer to the question is A. Analytical Engine.