Which option best completes in the diagram? A. A decline in home ownership O B. Elderly Americans living in poverty C. Widespread unemployment O D. Low crop prices ​

it increased 6 percent and reached that in 1980

this isn't a question and if you're going to list things be kind and use commas.

map scale refers to the relationship (or ratio) between distance on a map and the corresponding distance on the ground. for example, on a 1: 100000 scale map, 1cm on the map equals 1km on the ground.