Part A.The attacks on ambition are many and come from various angles; its public defenders are few and unimpressive, where they are not extremely unattractive.
What's the p.o.s of "where"? Is it a conjunction?
Part B.In addition, far more Japanese workers expressed dissatisfaction with their jobs than did their counterparts in the 10 other countries surveyed.
I don't understand the usage of "did" in these sentence, is it a emphatic sentence or a inverted one?
Part C.Urban Japanese have long endured lengthy commutes(travels to and from work) and crowed living conditions.
Why use travels instead of travel?