Final answer:
The best estimate for the mass of a pair of goggles is 25 grams, as they are lightweight items similar to everyday objects like pennies that are also measured in grams.
Step-by-step explanation:
The best estimate for the mass of a pair of goggles would be 25 grams. Goggles are light and designed to be comfortably worn on the face, making them much lighter than options B (250 grams), C (25 kilograms), and D (250 kilograms). A pair of goggles is certainly closer in mass to everyday small items such as 5 pennies, which combined are approximately 12.5 grams, rather than large, heavy objects that are measured in kilograms. Therefore, option A, 25 grams, is the most suitable estimate for the mass of a pair of goggles.