B) joyous
Also you can see that all the other options are synonyms of each other.
Sports became more popular in the 1950's, called the golden age, because of cultural aspects as well as a successful way of estimulating healthy habits, less sedentarism and leading to less expenses to the government related to health insurance costs and also positive marketing about the American education. Sports have started an era of popular family activity which was gradually improved since then.
Animals will sometimes whine. Other times they would be incredibly inactive and choose to hide.
