Which method of gathering data will be most effective in learning how diet and fitness choices affect long-term health? a. an experiment b. an observational study c. a sample survey d. a census

The answer is B. An observation study

Step-by-step explanation:

It is because of the controlled amount of people doing the diet, and how the diet affects them.

step-by-step explanation:

two pairs of adjacent sides are of equal length. this implies that one diagonal divides the kite into congruent triangles, and so the angles between the two pairs of equal sides are equal in measure. it also implies that the diagonals are perpendicular.