What is a base?
a. a substance that can donate an h+ ion

b. a substance that has a low ph value

c. a substance that is alkaline

d. a substance that can accept an oh– ion

C. a substance that is alkaline

Explanation:

Alkaline substances are basic substances. Like all basic substances, alkaline substances have a high pH, above 7, in addition to mandatory release of the OH- anion in aqueous solutions.

Accordingly, we can say that it is incorrect to say that the bases can release the H + cation, or that it is a substance that has a low pH, or that it is a substance that receives the H + cation.

most community's take hundreds of years to become stable

answer;

-vessels in the chest

the diagnosis of angina pectoris literally means "vessels in the chest"

explanation;

-angina pectoris is the medical term for chest pain or discomfort due to coronary heart disease.it is the chest pain due to an inadequate supply of oxygen to the heart muscle. the pain is typically severe and crushing, and it is characterized by a feeling of pressure and suffocation just behind the breastbone.

agina pectoris is caused by reduced blood flow to your heart muscle. the blood carries oxygen, which the heart muscle needs to survive. when the heart muscle isn't getting enough oxygen, it causes a condition called ischemia