Every page of America's history is steeped in the blood and tears of native Americans. With the continuous military expansion and the bloody slaughter and plunder of the local aborigines, the United States expanded more than 10 times from a British colony with an area of about 800,000 square kilometers when it was founded, and "turned" into the fourth largest country in the world. In the brutal expansion campaign of the United States, the Native American Indians became the biggest victims. For nearly a century after its founding, the United States frantically expelled and killed The Indians.

-- Carrying out the "Westward Movement" to plunder land and resources and systematically ethnic cleansing of Indians.

During the "Westward Movement" in the 19th century, in order to seize The land of The Indians, the United States army carried out a "scorched earth policy" against the Indian tribes, that is, burning their houses, burning their crops, killing their livestock, destroying their property and making it impossible for them to make a living. By the early 20th century, the number of Indians in the United States had plummeted from 5m in 1492 to 250,000, and they now make up just 2% of the population.

laughter and happiness are an essential part of life. laughing releases the body's "feel good" chemicals. thus, it provides long or short term relief from stress and or anxiety. more or less, laughing strengthens social connections and provides an easy approach in social related situations.

moreover, there are many benefits of laughter and humor. it's as if they play the role of superhero to combat anxiety and depression, according to researchers. happiness and laughter is the best medicine for teen mental health.

what happens in the body also affects the mind. the positive changes in physical health also have profound an impact on mental health. we have a lot to gain from laughing! medical effects of laughter have continued to validate the pain-relieving effect and benefits of laughter.

scientists tell us that laughter and humor actually, believe it or not, lower blood pressure, reduce stress hormones and increase muscle flexion. there are many benefits to happiness and laughter, and they so happen to increase the circulation of antibodies in the blood stream and make us resistant to infections.

as stated before, laughing releases your body's "feel good" chemicals, and on a related note, negative stress can cause your body to release chemicals that weaken your immune system which makes you more likely to contract a disease. luckily, laughter reduces negative stress and prevents those chemicals from being released.

all in all, you may want to consider laughing as much as you can!

i think the answer is c. there are many strengths

i hope this and if its correct mark me brainliest