What is compression a) region of zero pressure in a medium caused by a passing wave b) region of high pressure in a medium caused by a passing wave c) region of low pressure in a medium caused by a passing wave d) region of high altitude in a medium caused by a passing wave

When can a theory be modified if a new type of technology allows for new observations that raise new questions? a-immediately, while the questions about the theory are being asked b-after new hypotheses related to the theory are tested in experiments c-only after the new observations disprove all parts of the theory d-while scientists begin to think about how the theory could improve