Question

until 1917, there was no formal measure in the united states senate that could be ______ to end a debate that had been excessively prolonged as a tactic to block voting on a matter. in that year, a procedure was created to allow a majority of senators to curtail deliberation and force a vote. which choice completes the text with the most logical and precise word or phrase? a. improvised b. invoked c. abolished d. partitioned

Explanation:

• Analyze each option:
• A. "improvised" means created spontaneously, not fitting "formal measure" context.
• B. "invoked" means to call on (a measure/rule) for use. A formal measure to end debate would be "invoked" to be used, which fits.
• C. "abolished" means to end, but the measure is for ending debate, not ending the measure itself.
• D. "partitioned" means divided, irrelevant here.

Answer:

B. invoked