The most distinctive symptom of measles is:

The most distinctive symptom of measles are the rash.
They are usually blotchy and red and starts from the infected person's head then spreading downward to the rest of the body (so head to toe).

Early in the story when tom finds an indian skull in the woods which he kicks in temper. the devil then makes his appearance and, as tom surveys him, he notices that the devil is neither "negro" nor "indian." in fact, he has a "swarthy" complexion and is "begrimed with soot."

Answer (d) may increase or decrease porosity through dissolution or deposition;