Which sentence does not correct this run-on sentence?

the earliest form of the internet was designed more than thirty years ago it was intended to be used by the military.

a.
the earliest form of the internet was designed more than thirty years ago, it was intended to be used by the military.

b.
the earliest form of the internet was designed more than thirty years ago, and it was intended to be used by the military.

c.
the earliest form of the internet was designed more than thirty years ago; it was intended to be used by the military.

d.
the earliest form of the internet was designed more than thirty years ago. it was intended to be used by the military.

Magnesium is the fourth most abundant mineral in the body and is essential to good health. magnesium is needed for more than 300 biochemical reactions in the body. it maintain normal muscle and nerve function, keep bones strong, keep one’s heart rhythm steady, and supports a healthy immune system. magnesium also regulate blood sugar levels, promotes normal blood pressure, and may play a role in energy metabolism and protein synthesis. doctors and scientists are trying to determine whether magnesium may play a role in preventing and managing disorders such as hypertension, cardiovascular disease, and diabetes. which is the main idea of this paragraph? a. the role of magnesium in human nutrition is being studied intensely. b. magnesium may be related to the body’s metabolism and other healthy functions. c. magnesium appears to contribute to hypertension, cardiovascular disease, and diabetes. d. magnesium and a healthy immune system are separate diseases.

What is the correct def of moif? an idea or object that recurs in a text

In the story “ one thousand dollars,” robert gillian forfeits a 50,000 inheritance. what is the theme expressed by the author in this story ?