If you have 4 engines on an aircraft and then lose engine 1 and 2, which are on the left side of the aircraft, will the aircraft turn left or right?

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