Which of the following does NOT provide a buffer against the effects of stress?
a. exercise
b. family and friends
c. optimism
d. smoking

d. smoking

This is the answer.

i believe the answer is 323 ft

step-by-step explanation:

step-by-step explanation:

points a and b are equidistant from the desired line, so the line you find by using them will go through point r.

using points other than a and b will give the desired line only if they are equidistant from r. if they are randomly located, the perpendicular line you create will not necessarily go through point r, hence will not be a solution to the problem.