Question

read the following excerpt from the passage, then choose the correct answer. excerpt from \africa digs!\ they put the bones on a ship, which takes them across the atlantic. then, the bones are shipped to chicago. the team carefully opens each piece and cleans each bone. they match the numbers on the jackets to the numbers in the digs log. the bones are put in the right order. now its time to rebuild the skeleton. this step takes two years and hundreds of hours. they use dental tools, tiny jackhammers, and chemicals. the work is careful and precise. they have to clean more than 200 bones. these bones came from the adult jobaria. but they have some other bones as well. these are from young jobaria. they clean these bones too. 2: once the bones were in chicago, which step happened first? a the scientists brushed the bones. b the scientists unwrapped and cleaned the bones. c the scientists made clay bones to fill in the missing ones. d the scientists attached copies of the bones to a steel frame.

Explanation:

To solve this, we analyze the steps after the bones reach Chicago. The passage says "The team carefully opens each piece and cleans each bone" first. Option A is about brushing (not mentioned as first), Option C is making clay bones (later step), Option D is attaching to a steel frame (later). Option B matches the first step of unwrapping (opening) and cleaning.

Answer:

B. The scientists unwrapped and cleaned the bones.