Context: Read the text.
It takes a long time and a lot of hard work to become a veterinarian. You'll want to start by finishing high school and going on to college. During college, you might study biology, chemistry, or animal science. Then, after four years of college, you'll attend four years of veterinary school. There you will learn more about medicine and animals and how to care for them. After finishing veterinary school, you will need to pass a test called a licensing exam. Then, at last, you can work as a veterinarian.
Which text structure does the text use?
A. sequential
B. cause-effect
From the given choices, select the correct answer and reply with the letter of the chosen option.

A