Social anxiety disorder is interesting, I have it, its a common one in teens.
Answer:
In the recent years,advances in the agricultural field as well as genetic engineering field has made it possible to produce large number of crops which have increases source of nutrition in them. Due to this, conditions such as famine re being completely eradicated from the world. During the previous times, we see how enormous number of deaths were caused just due to lack of food and famine conditions.But in today's world, we hardly hear that a country has been hit by famine. Although some countries still have malnutrition in them but these situations are being tackled. Hence, easy access to food resources has turned the rich man diseases to become poor man's diseases too.
ITS THE CORRECT ANSWER I TELL U
Indeed, C and B both are correct, however, A is also correct as your circulatory system will be mostly affected due to lower oxygen levels. Due to these, there will also be less oxygen which can be caried around in your bloodstream.