Need asap; will give brainliest if correct

why are all planets almost spherical in shape?

a) because a planets gravity pulls equally from all sides
b) because large bodies in space break apart due to gravity
c) because gravity pulls all material towards the edge of a planet
d) because rotation pushes outward the material inside the planet

Refrigerant-134a flows through a carnot heat pump cycle at 0.5 kg/s. it is known that the maximum absolute temperature in the cycle is 1.1 times the minimum absolute temperature, and the net power input to the cycle is 2.5 kw. if the refrigerant changes from a saturated vapor to a saturated liquid during the heat rejection process, determine the maximum magnitude of the enthalpy of vaporization for this process in kj/kg (with 3 significant figures).