This is a question with answer options. Goal: To make mac and cheese

Which of the following methods is more reasonable for accomplishing this goal?

Select from the following.
(a). Fill a pasta pot with water and bring to a boil at low heat on a stove top. Add 4 cups pasta and cook according to the instructions on the box. Drain by pouring pasta and water through a strainer. Place three tablespoons butter in a separate pot and melt at medium heat. Add three tablespoons flour and stir with a wooden spoon until the mixture is lightly browned. Add 1 1/2 cup milk and 1/2 cup heavy cream and whisk with a balloon whisk to remove lumps. Add 1/2 tablespoon paprika, salt and pepper according to taste. Whisk. Cook over medium-high heat until sauce thickens. Add 2 cups colby jack cheese and stir until the cheese melts. Take off the stovetop and add the drained pasta. Stir and serve.
(b). Fill a pasta pot with water and bring to a boil at high heat on a stove top. Add 4 cups pasta and cook according to the instructions on the box. Drain by pouring pasta and water through a strainer. Place three tablespoons butter in a separate pot and melt at medium heat. Add three tablespoons flour and stir with a wooden spoon until the mixture is lightly browned. Add 1 1/2 cup milk and 1/2 cup heavy cream and whisk with a balloon whisk to remove lumps. Add 1/2 tablespoon paprika, salt and pepper according to taste. Whisk. Cook over medium-high heat until sauce thickens. Add 2 cups colby jack cheese and stir until the cheese melts. Take off the stovetop and add the drained pasta. Stir and serve....I think the answer is
(b).