What does primary mean as it's used in the sentence today the X-ray is still the primary to as a doctor use to find a broken bone in their health problems A. safest
B. latest
C. most used​

latest

Explanation:

C.

Explanation:

Before primary was used the sentence states that "X-ray is still the primary" meaning it's been the most used method to find a broken bone.

fiction/fantasy

explanation:

onto a large boat, and mark the water level that the boat sinks to. then, take the elephant out and put a bunch of marked weights onto the boat until it reaches the same water level. add up the masses of the weights to get the weight of the elephant.