A potential buyer of the breed of cat known as a Siamese cat wishes to find the average weight and height of a full-grown animal. Which of the following is an effective method of collecting a sample of the population?

Measuring the weight and height of all Siamese cats in the United States

Sending a questionnaire to breeders at the nationally recognized Cat Breeders Association of America and asking them for their expert opinion regarding the average weight and height of these cats

Measuring the weight and height of 10 Siamese cats found at the local animal rescue center

Measuring the weight and height of 200 Siamese cats from across the United States