Answer:
Single gene disorders are caused by DNA changes in one particular gene, and often have predictable inheritance patterns.
some disorders are; cystic fibrosis and sickle cell anemia
Explanation:
B) Mammography is correct
Don't rely on me for a test but I would say it's all of them in some form or another
A natural disaster could cause you to lose everything
PRETTY MAJOR LIFE CHANGE
An environmental issue could cause your struggles to increase especially if it has to do with financials (ex. Gas prices go up)
PRETTY MAJOR IF YA ASK ME
An everyday problem Is kind of the outcast in this selection because it's not major at all. You will more than likely get over it
A new situation could be for better or worse
You might have a headache or you might be super hot or dehydrated