Question

scientific knowledge builds a body of knowledge that is always growing and changing as scientists...
ask new questions but rely completely on what was known before.
ask new questions and only accept answers that align with their personal beliefs.
introduce their opinions and ignore what was known before.
ask new questions and rethink what was known before.

Explanation:

Scientific knowledge evolves as scientists pose new questions and re - evaluate prior knowledge.

Answer:

ask new questions and rethink what was known before.