Joe's dog has a mass of 28 kilograms. If you want to know about the solution, all you need to consider is this example: 1kg = 1000g. Therefore, the 28,000 gram dog is all-in-all 28 kilograms in terms of overall mass.
So, the function is obviously shifted up by 1 so it rules out A and B, and we also see that the period is 4pi rather than 2pi, and using the fact that:

Now that we know our b value, we see that the correct answer would be C.
288 inches is in 24 feet.