⟩ Designs are periodically modified to, a) improve product performance b) strive for zero-based rejection and waste c) make products easier and faster to manufacture d) all of the mentioned
d) all of the mentioned
Explanation: Designs are periodically modified to
a) Improve product performance
b) Strive for zero-based rejection and waste
c) Make products easier and faster to manufacture
d) Consider new materials and processes that are continually being developed.