The human immune system defends the body from pathogens. which of the following are parts of the human immune system ( need asap)

a.) skins, neurons, muscle cells, pancreas
b.) mucous, urine, kidney
c.) skin, lymph nodes, white blood cells, and spleen
d.) white blood cells and red blood cells

The table presents the average day and night temperatures in five cities. it also reveals whether a city receives substantial rainfall (wet climate) or little rainfall (dry climate). which city’s rocks are likeliest to experience frost wedging, and why? a) city a because the consistently subzero temperature would prevent water from melting b) city b because it is a wet region and the temperature fluctuates around the freezing point c) city c because it receives plenty of rain fall and the weather is moderately cool d) city d because the hot and dry weather would cause rocks to absorb water