Passage FourAll over the world,

Passage Four
All over the world, and for many different reasons, there are millions of people who rarely or never eat meat. These people are called vegetarians. To people who eat meat, being a vegetarian may seem like a very strange thing, but most vegetarians are very happy with their choice of diet. They chose such diets for several different reasons.
First, vegetarians have an enormous health advantage. One of the major health problems in modern societies is not too little protein but too much food, especially in the form of animal fats. Medical evidence suggests that animal fats, including butter, contribute to the development of cholesterol in the human body. High amounts of cholesterol seem to be part of the cause of heart disease. Most vegetarians have low levels of cholesterol. High amounts of animal fats also seem to lead to certain kinds of cancer, and vegetarians are typically less vulnerable to these cancers than people who eat a lot of meat. Overall, studies comparing the health of vegetarians and meat-eaters show that the meat-eaters are twice as likely to die of heart disease as vegetarians are.
Better health is one reason that people choose to become vegetarians. Another reason is religion. Some religions forbid the eating of meat. The largest of these is the Hindu religion, which has about 600 million believers in the world. Although not all Hindus are vegetarian, many are, and there are many believers of other religions such Buddhism and even some Christian religions who also do not eat meat.
Many vegetarians do not eat meat simply because they do not like the taste of it. They have no religious or philosophical reasons; they just do not like meat. Another important reason that vegetarians give for not eating meat is the health advantages that were given above. Lastly, there are many people who do not eat meat because they just do not like the idea of killing animals for food. They believe that life, all life, is valuable, and that we do not have to destroy life to feed ourselves when there are other good sources of food.

What does “vulnerable” mean in Paragraph 2?
A、 Having low level of cholesterol.
B、 Having high level of cholesterol.
C、 Having weak ability to resist diseases and harms.
D、 Having strong ability to resist diseases and harms.
【正确答案】：C