Which of the Following Best Describes a Model Organism

Which of the following best describes a model organism?

A) It is often pictured in textbooks and easy for students to imagine.
B) It lends itself to many studies that are useful to beginning students.
C) It is well studied, easy to grow, and results are widely applicable.
D) It is small, inexpensive to grow, and lives a long time.
E) It has been chosen for study by the earliest biologists.