Select the erroneous part. If there is no error in the sentence, select option e (No Error).

The electronic conveyor-belt system, which Susan Park ⓐ adapted from a production-line method ⓑ pioneered by Thomas Langley, reduced the ⓒ required time being needed of assembling a Smart Gadget device ⓓ from over ten hours to just 120 minutes. ⓔ No Error