Use the time line below to answer the following questions: which of these events happened first

health and medicine because people are dying from not being healthy or not strong enough medicine

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.

they supported black codes so the answer is a or b