Agroup of stars, gas, and dust held together by gravity is a a. galaxy c. local group b. constellation d. both a and b

check for the pregnancy rating of drug. if its class c or d see if other alternatives

the correct answer is anaphylaxis.

anaphylaxis is a condition caused by insect bites, foods, medications, manifested by tongue swelling, shortness of breath, vomiting, low blood pressure. it sometimes may occur without an obvious reason. it is treated with epinephrine injection.other tretments include antihistamines and steroids,