Which one of the following statements is correct regarding blood pressure?

• A
  $130/90 \ mm \ Hg$ is considered high and requires treatment.
• B
  $100/55 \ mm \ Hg$ is considered an ideal blood pressure.
• C
  $105/50 \ mm \ Hg$ makes one very active.
• D
  $190/110 \ mm \ Hg$ may harm vital organs like brain and kidney.