Insertion of a device into the muscle to measure the pressure within the muscle is monitoring of

The answer that would fill in the blank for the statement: Insertion of a device into the muscle to measure the pressure within the muscle is monitoring of:___, would be: Interstitial Fluid Pressure, or IFP.

Explanation:

Normally, between tissues, little to no fluid should exist. However, in certain diseases, like for example in tumorous cancers, the blood vessels, and lymphatic vessels, become leaky, and allow fluids to move from them into the interstitial space. When this amount of fluid exceeds the limits, organs become severelly affected, including the muscles, bones, and the skin. The measuring of this IFP allows doctors to know how severe the problem is getting and in extreme cases may lead to the insertion of methods to drain this fluid, and use of medication as well.

i think a) betsy can donate only blood to mark is correct because, mark and betsy have the same blood type. whereas nobody else has b+ blood so betsy can't donate to them.