The primary eletion as a means of choosing the states' delegates to the national conventions where the presidential nominee is formally seleted:

A.was introduced during the jacksonian era.
B.is used in Europe as well as in the United States:
C.has been adopted more widely in recent decades,such that the candidate who dominates the primaries can usually expect to have won enough delegates to be assured of nomination at the convention.
D.is being replaced by the open-caucus system of selecting delegates.

I thank it is (D).

I don't think so.

http://www.cfr.org/united-states/caucus-system-us-presidential-nominating-process/p15640

Is it (C)

I agree with C.

Thank you!!!

In order to determine the correct answer, we need to analyze each option and find the one that best describes the primary election system for selecting delegates to the national conventions.

A. "The primary election system was introduced during the Jacksonian era."

This statement is not accurate. The primary election system was not introduced during the Jacksonian era. The Jacksonian era, which refers to the presidency of Andrew Jackson from 1829 to 1837, predates the establishment of the primary election system.

B. "The primary election system is used in Europe as well as in the United States."

This statement is incorrect. While the primary election system is widely used in the United States, it is not commonly utilized in Europe. European countries tend to favor different methods for selecting political party leaders and presidential nominees.

C. "The primary election system has been adopted more widely in recent decades, such that the candidate who dominates the primaries can usually expect to have won enough delegates to be assured of nomination at the convention."

This statement is the most accurate out of the options provided. In recent decades, the primary election system has indeed gained prominence in the United States. The candidate who performs well and captures the majority of delegates in the primary elections typically secures the party's nomination at the national convention.

D. "The primary election system is being replaced by the open-caucus system of selecting delegates."

This statement is not true. The open-caucus system, while it may exist in some states, is not replacing the primary election system. Caucus systems and primary elections are separate methods for delegate selection, each with its own unique characteristics.

Therefore, the correct answer is C. The primary election system has been adopted more widely in recent decades, allowing the candidate who dominates the primaries to reliably secure the necessary delegates for nomination at the national convention.