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At one point, bovine high-altitude disease was causing 75,000 cattle deaths each year across the western United States. The illness is the bovine equivalent of human hypertension because it leads to high blood pressure in the arteries of cattle. Left untreated, it can lead to death. To help scientists understand this disease, more than 100 young Angus and Hereford bulls were selected to enjoy a working vacation at 8,700 feet (2,652 meters) above sea level. For four months, the animals would leisurely feed on lush, high-meadow grass in northern New Mexico. Scientists wanted to monitor the animals, hoping to determine a genetic cause.

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Scientists wanted to _________ cattle.

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A categorize
B safeguard
C insulate
D tranquilize

Categorize

The answer is C) insulate

The correct answer is C) insulate. Scientists wanted to insulate cattle.

To determine this, we can look for context clues in the given information. The scientists wanted to understand bovine high-altitude disease and determine its genetic cause. They selected young Angus and Hereford bulls to spend four months at a high altitude location. By monitoring these animals, the scientists hoped to gain insight into the genetic factors that may contribute to the disease.

In this context, the word "insulate" indicates the scientists' intention to protect or isolate the cattle in order to study them more closely and observe any genetic causes of the disease.