Although all known cellular life and some viruses contain DNA, biologists in the early 1900's had difficulty identifying DNA as the genetic material because of its
apparent simplicity. Although it is a long polymer, it is only composed of four
subunits-A, T, C, and G. It wasn't until the 1940's that scientists came to the
conclusion that DNA was in fact the molecule that contained the genetic
material. In 2-3 sentences, describe how DNA molecules store genetic
information for cells.

answer; ///i believe that the correct answer is (the worksheet);

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.