Malnutrition can cause edema because
- the resulting anemia increases blood pressure.
- interstitial protein levels are lower than plasma protein levels.
- there are not enough nutrients for plasma protein synthesis and interstitial protein levels are lower than plasma protein levels.
- there are not enough nutrients for plasma protein synthesis.
all of the answers are correct.

There are not enough nutrients for plasma protein synthesis.

Explanation:  

Kwashiorkor is a severe condition of malnutrition associated with the deficiency in the dietary protein. The lack of protein in the body causes osmotic imbalance in the gastrointestinal tract of the body.This is because there is not enough nutrients inside the body to  

This causes swelling in the body mostly in the stomach region known as edema.

Extreme fluid retention is observed in the people suffering from malnutrition causing edema.