Answer:
A. Weakened immune system
Step-by-step explanation:
The immune system is the system responsible for preventing our body from getting sick. This system prevents foreign bodies from entering the body and causing problems. When the immune system is weakened it will be easier to get sick, cold, with fever, among other things.
Low immunity has different causes and therefore needs a personal medical evaluation. Often those with weakened immune systems have simple symptoms such as thinning hair, brittle nails, headaches and colds.
One of the main causes of low immunity is poor diet as our body needs essential vitamins and minerals to strengthen the immune system. Hormonal variations can also affect the functioning of immune system cells. This is due to progesterone levels that increase in the second phase of the menstrual period - and this inhibits the female immune system. However, some women suffer these effects more than others.