In which sentence below is the comma used correctly?
a. in the first round of the tournament, i played one of the best teams.
b. in the first round, of the tournament i played one of the best teams.
c. fortunately i had, a spare set of keys with me.

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.

Which type of poetry often begins by announcing the subject and asking a muse for ? a. epic poetry b. dramatic poetry c. sunnets d. ballads

Modernist poets were concerned with many issues and used their poetry to express their concerns. which item from this list was not one of their concerns? a. corruption of traditional american values b. brutality of wwi c. the effects of the great depression d. crowded, crime-ridden city life e. alienation of the individual