How did US veterinarians typically receive training before veterinary schools were established?

Before the establishment of veterinary schools in the United States, students studied veterinary science in Europe and had to complete a(n)

before they could start their own practice.

The correct answer to this open question is the following.

Before the establishment of veterinary schools in the United States, students studied veterinary science in Europe and had to complete an undergraduate program for four years before they could start their own practice. They required experience in animal handling.

The first veterinaries that arrived at the United States where English Charles Clark in 1817 and Prussian John Rose in 1827. The first Veterinary colleges in the United States were the New York College of Veterinary Surgeons (1857), Cornell University (1868), and the American Veterinary College (1875). In 1903, the Iowa State College opened the first four-year veterinary course.

what are the choices?

increases in demand are shown by a shift to the right in the demand curve. this could be caused by a number of factors, including a rise in income, a rise in the price of a substitute or a fall in the price of a complement.

which the answer is:

b