In general, it was an increase in the service industry that led to a decline in labor union membership, since many of these workers don't need representation.
The correct answer that would best complete the given statement above would be "threatening to secede from the Union". <span>In the early 19th century, south Carolina protested what it believed to be a violation of its rights by </span>threatening to secede from the Union.
C. Sets 60-day limit on any presidential commitment of troops to foreign lands.
Number (1) should be your answer. It's definitely not 2 or 4