People who never develop symptoms or are not yet showing symptoms (pre-symptomatic) might not know that they are infected but can still spread rona to others. Masks also offer protection to the wearer.
Answer:
During the period of 1200-1450, the Silk Toad trade networks and the trans- Saharan trade networks facilitated a flourishing trade in luxury goods across afro-eurasia
Explanation:
The war started mainly because of four aspects Militarism Alliances Imperialism and Nationalism. This is because big armies become potential threats to other countries.
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The answer is b............................
