Answer:
People with poor self-esteem frequently feel unattractive, uncomfortable, or inadequate. Hypersensitivity is more common in those who lack self-confidence. They have a weak sense of self that is readily injured by other people.
<span>Edward Jenner discovered a vaccination against [smallpox] by infecting a boy with [cowpox]. He noticed that milkmaids who got cowpox never got smallpox and developed his theory from there. He is the father of the study of immunity and immunisation.</span>
In this case the answer would be B