Please give detailed explanation of what the answer is. Its essential . The answer is A, please explain why it is!

Midierm Examination COMP 2401 Questions 3 and 4 are based on the following declarations are defined and are used on a computer where the alignment . Assume that the following data typedet struct cart LA long numCars short fuelTankSize unsigned long serialNumber : unsigned char numDoors CarType struct truck unsigned long serialNumberi long numTrucks; short loadCapacity char numSeats: union u CarType car: struct truck trucki 3. What will be printed when main is executed int main (int argc, char argv) union u x printf("sizeo a siseof (ostret cruck) - d n sizeof (CarType), sizeof (struct truck))i Answer: a) sizeof (CarType) 16 sizeof (struct truck) - 12 b) sizeof (CarType) -11 sizeof (struct truck) 11 c) sizeof (CarType) 12 sizeof (struct truck) 16 d) sizeof (CarType) 12 sizeof (struct truck) - 12 e) None of the above