Because water has a higher specific heat then land, it what?

Though water has higher specific heat than land it can absorbs and releases heat slower than land.

Explanation:

The specific heat of the water is higher than land, that's why it has the tendency to absorb and release the heat slower as compared to the land. It also takes more heat to increase the temperature for one gram of water by one degree  than it also does to increase the temperature of the land. similarly the heat absorbed by the ocean is almost spread in the greater volume as the ocean is a transparent body.

c. earths continental crust is thicker than its lithosphere.

because, the lithosphere is the outermost layer of the earth/ 100 km thick and is defined by its machanical properties.the lithosphere contains oceanic and continental crust that varies in age and thickness across locations and geologic time. the lithosphere is the coolest layer of the earth in terms of temperature. the term lithosphere should not be confused with the use of "geosphere" which is used to indicate all of earth systems, including the atmosphere, hydrosphere   and biosphere. the surface of the earth can be divided into the continental crust and the oceanic crust.   the continental crust is made mostly of granite while the oceanic crust is made of basalt. the average thickness of the continental crust is 25 miles and the average thickness of the oceanic crust is 5 miles.   three types of rock, igneous, sedimentary, and metamorphic, make up the surface of the earth. that's why 3 option is preferable.