Answer:
D. Better weapons and technology .
Explanation:
The American Army always enjoyed technological superiority and superior fire power over the communist forces. The US had air and naval superiority, and also in conventional power.
But the North Vietnamese had great manpower reserves and an iron determination to fight what they saw as a foreign occupier as long as it was necessary with persistent and intrepid guerrilla tactics, an asymmetric response to a stronger adversary. History provides many examples of the Vietnamese people´s fight against outside intruders in protracted guerrilla wars until the enemy wears down: the Chinese, the Mongols, the French and the Americans.
Firms spend money and time to advertise to showcase their product among the competition.
<h3><u>Explanation: </u></h3>
Advertisement is a form of communication between a seller of goods/services and the consumer. It allows individuals to bring their goods/services in public eye, awarding them of the existence of the said goods/services.
Firms spend a lot of time and money on advertising because it is one of the most effective ways to increase sales and potential customers. It allows firms to expand their market area. As the area expands, so does the base of their audience and hence, more people learn about its existence. An effective advertisement requires time and money so that it looks more attractive and compelling among the competition.
The right answer is the third one: the bubonic plague originated in the Gobi Desert, part of the then Mongol Empire, around 1320. It then propagated to China and subsequently to India, Europe and Russia. The disease spread via trade routes mainly as a result of a poor hygiene. It never reached the American continent or Sub-Saharan Africa.
The colonial policies and practices that played a part in peaceful or violent transitions to self-rule were very complex. One major one which had a very important role here was Apartheid. This was an important policy which had at its core racial segregation between black and white people.