The Arctic tundra has wetlands caused by .
A. glaciers that melted thousands of years ago
B. soil that is frozen solid all year
C. summer thaws combined with frozen permafrost
D. the overflow of a large lake each summer

B.soil that is frozen solid all year

C.summer thaws combined with frozen permafrost

D.the overflow of a large lake each summer

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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.