Which one of the following is an example of an interval level of measurement?

Which one of the following is an example of an interval level of measurement?
 
  a. height (in inches)
  b. weight (in pounds)
  c. age (in years)
  d. temperature (in degrees Fahrenheit)

Question 2

Which one of the following is an example of a ratio level of measurement?
 
  a. the number of times a laboratory monkey presses a bar in its experimental chamber during a one-hour period
  b. the temperature in Celsius of a hospital patient
  c. a racing-car driver's position at the end of a race
  d. a patient' rating of his own anxiety level on a scale where l0 represents low anxiety and l00 represents extreme anxiety