What purpose do financial incentives serve?
a) they act as trade barriers.
b) they limit imports.
c) they set standards.
d) they restrict all trade.

The correct answer is A.

When financial incentives are granted to domestic producers, these would be able to offer a product or service at a lower cost than without the monetary injection. Therefore, these domestic firms will be operating with more favourable conditions than foreign competitors in the national markets, which means that those financial incentives are acting as a trade barrier.

union blockade

explanation:

the union blockade in the american civil war was a naval strategy by the united states to prevent the confederacy from trading.

the blockade was proclaimed by president abraham lincoln in april 1861, and required the monitoring of 3,500 miles (5,600 km) of atlantic and gulf coastline, including 12 major ports, notably new orleans and mobile. those blockade runners fast enough to evade the union navy could only carry a small fraction of the supplies needed. they were operated largely by british citizens, making use of neutral ports such as havana, nassau and bermuda. the union commissioned around 500 ships, which destroyed or captured about 1,500 blockade runners over the course of the war.

ok

explanation: