Which of the following describes an advantage that secondary sources have over primary sources for historians?

a) they can reveal to a historian exactly how people of an ancient culture lived?
b) they can provide a general summary of evidence other historians have discovered.
c) they can act as hard evidence to prove whether a society used a particular tool.
d) they can offer historians a firsthand interpretation of an important event.

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.

“a committee reviews the bill and marks it up to make it more viable and to reflect interests 

the correct answer is d

a conference committee is a group of congress representatives appointed by the senate and the house to reach an agreement over a bill that had different versions in each chamber. this is due to the fact that, to pass a law. both the house and the senate must agree on the exact same content and wording of the bill to present it to the president.

marlow

explanation: