As water is cooled from 4° C to 0° C, its density A. stays the same
B. decreases and increases
C. increases
D. decreases

I believe that it increases (becoming more dense)

Explanation:

Well 0°C is freezing point so I think that in that state it will become a solid from a liquid and freeze into ice.

starchy vegetables are high in carbohydrates.

starchy vegetables contain more carbohydrates than non-starchy vegetables.

explanation:

there are two primary categories of carbohydrates, essentially differentiated on the basis of their carbohydrate content (which is in the form of starch - a complex carbohydrate):

those vegetables which contain little amounts of starch are termed as non-starchy vegetables, and some examples include: artichokes, broccoli and bean sprouts.

vegetables high in their starch content are distinguished as starchy vegetables, and some examples include: potatoes, chickpeas and corn.