What would most likely cause the cycle to continue?
a. an explanation inspires new questions and the process of making new observations.
b. a fact inspires new questions and the process of making new observations.
c. a careful systematic process is used in experiments to gather observations and data.
d. a fact is established and more data is needed to convince scientists that it is true.

a. An explanation inspires new questions and the process of making new observations.

Explanation:

When we are researching a topic, we often begin with a question. However, it is very likely that in the process of researching in order to answer this question, we end up wanting to find out more about the topic. In this way, once we arrive to an explanation, we often have new questions, and we need to go back to the process of making new observations.

the median of the data is 4.5.