Answer: Option A
Explanation:
Rheumatic fever is a disease which affects the joints of the body. It also affects the skin and brain of the body.
Rheumatic fever symptoms is very similar like the common cold and fever. This fever can also occur after the throat infection which is caused due to group of bacteria known as Streptococcus.
It has the ability to cause sore throat, scarlet fever and infections in different parts of the body.
Rheumatic fever takes places if the strep throat and scarlet fever is not treated on time.
C, when mutations are not always predictable they are random
Binary fission occurs in single-celled organisms only and mitosis is just one cell dividing into two (eukaroytic cells)
They are able to travel in a vacuum at the same speed.
Hope it helps
