Early local unions were formed by __________ workers and were based on __________.

Early local unions were formed by __________ workers and were based on __________.
 
  a. skilled; individual self-interest
  b. skilled; shared interests
  c. semi-skilled workers; individual self-interest
  d. semi-skilled workers; shared interests
  e. political parties; political interests

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What is the difference between general and mass strikes?
 
  a. General strikes are those in which the general population takes part; mass strikes involve a mass of different type of workers (e.g., different trade unions).
  b. General strikes are those in which involve different types of workers (e.g., different trade unions); mass strikes are those in which the general population takes part.
  c. There is no real difference between the two types of strikes except that general strikes often lead to mass strikes.
  d. There is no real difference between the two types of strikes except that mass strikes often lead to general strikes.
  e. General strikes originate from a general, rather than a specific workplace grievance; mass strikes arise in response to a mass of specific grievances.