Which of the following describes the location of the opposite of the number that R represents on this line? vertical number line from negative 6 to positive 6 in increments of 2 is shown. Only the whole even numbers are labeled. A point labeled R is placed on the 4th tick mark below the 0.

(3 points)

a
At a distance of 4 tick marks above 0
b
At a distance of 4 tick marks below 0
c
At a distance of 8 tick marks below 0
d
At a distance of 8 tick marks above 0