Trade surpluses and trade deficits can be for an economy in certain circumstances.

a) beneficial

b) harmful

c) either a or b

d) neither a or b

C) Either a or b.

Explanation:

Trade surpluses occurs when a country exports more than it imports and trade deficit occurs when a country imports more than it exports.

Although economy of every country is different, some survive at imports and some at exports, circumstances also play an important role.

c) either a or b

Explanation:

Trade surplus refers to when the value of a country's exports exceeded its imports.

Trade deficit refers to when the value of a country's import exceeds its exports.

Trade surplus can be beneficial as its tends to enable the exporting country earn foreign exchange thereby boosting its foreign reserves.

Whereas on the other hand, it can lead to deficits as the importing country would need to spend more foreign exchange getting the products and then depleting its foreign reserves.