What is the effect of eating martian food and drinking martian water?

The effect would be to suffer severe intoxication.

Explanation:

As we know, most of the food comes from the soil through agriculture. Although Mars has soil, it is not agricultural, as it has elements that are toxic to living beings and even if it were possible to grow some food in that soil, it would not be recommended to eat it, because the food absorbs the elements of the soil and would become toxic also.

Similarly, mars water is also toxic, as it has a high concentration of perchlorates, which can poison living beings.

it would most likely be b. your welcome.

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hope that ! : )