Roberto plans on becoming a marine biologist, and he is quite concerned about cleaning up current water pollution and preventing future pollution. Which of these ways probably will be effective in reducing water pollution? Choose the three statements that apply. A. Clean up and prevent oil spills.
B. Enact laws that control possible pollutants.
C. Have factories dump wastes on the land instead of into the water.
D. Encourage farmers to leave plants in the field after harvest to prevent chemical runoff.

A, B & D are the options that apply to the question.

Explanation:

The main focus of marine biologists is study of the effect of organisms and ecosystems on oceans and other Salt water bodies or environments.

Now, to clean up water pollution and prevent future occurrence, he could;

- Clean up spills and prevent new spills. Thus option A applies.

- He cannot enact any law because he is not in a position of authority to do so but rather he could engage those in authority to create laws or policies with control measures with respect to the pollution. Thus, option B does not apply.

- He should talk to factories and those who generate industrial waste to ensure that their waste is dumped on land and not water. Option C applies.

- He should encourage farmers to leave their plants on the field when they are done harvesting so as to prevent indiscriminate dumping and possibly running off into water.

the answer for sodium is 0.186

the answer for rubidium is 0.251