I think it’s the last one
The answer is option a, that is "The stamps were carved out pure limestone".This sentence is false because the stamps were actually made of another kind of rock such as stearite which is a magnesium-rich rock composed of mineral talc and some of them are also made of silver or calcite.
The bottom will be C "Unionists supported secession as a last resort and only if it was done with full support of all of the southern states, while Secessionists opposed secession altogether.
Answer:
Trade
Explanation:
Since the 1990s, trade has grown very fast, driven by a mix of technological change and policy reforms.