Its definitely not A or D because there are 26 weeks in 6 months.
generally, a weight loss of 1-2 lbs per week is reasonable and safe.
I would say B because it is unrealistic that someone would always lose 2lbs a week
so if you look up things that can cause an asthma attack it will also show that viruses and bacteria are a cause. with asthma you lungs could already be inflamed as well as your air way wich makes it harder to breath. when you have c-19 it will inflame your lungs even more so it makes it even harder to breath given an asthma attack. more asthma attack now are probably caused by c-19 because it is all over the place and the percent of asthma attack by virus has dramatically increased.
The answer is energy i am pretty sure