Although your manager speaks English as a second language, he is an accomplished communicator and adamant about clear writing. He circled the following sentence in your draft of a report but left you to figure out what is wrong: "We have implemented improvements in quality control at every stage of the manufacturing process." How should you revise the sentence?
a. We have implemented improvements in quality control at every phase of the manufacturing process.
b. At every stage of the manufacturing process, we have implemented improvements in quality control.
c. We have improved quality control at every stage of the manufacturing process.
d. At every stage, we have implemented improvements in quality control of the manufacturing process.