A scientist wants to find the average mass of fish living in a large pond. So she will use the masses of a sample of fish from the pond to find the average ma Answer the questions below. (a) Which unit(s) could be used for the unit of measurement? Check all that apply. kilograms grams O centimeters ☐ meters milligrams (b) Which of the procedures below would be the best way to find the average mass? Pick 42 fish from a shallow region of the pond and estimate their masses. Pick 2 fish from a shallow region of the pond and weigh each of them. Randomly pick 42 fish from the entire pond and measure their masses. Randomly pick 2 fish from the entire pond and estimate their masses.