You decide to create a new set of variables using the variable labelled as \"pregnancies ' initially defined as the number of times a woman was pregnant. The new variable is a binary variable stating if a woman was pregnant (1 = yes, 0 = no). The first 5 observations are processed from {6, 1, 8, 1, O} to {1,1,1,1,0}. What kind of change in the scale of measurement is it? ' a. ordinal to interval b. ratio to nominal c. nominal to interval d. interval to ordinal