Why did the democratic party choose james k polk as their presidential candidate?

Because he was a member of the Democratic Party and an advocate of Jacksonian democracy.

Explanation:

James K. Polk Is Elected 11th President of the United States. When James K. Polk accepted the Democratic Party's nomination for the presidency, he was not very well known.

Democrat James K. Polk defeated Whig Henry Clay in a close contest turning on the controversial issues of slavery and the annexation of the Republic of Texas. President John Tyler's pursuit of Texas annexation threatened the unity of both major parties. The convention instead chose James K.

#2 the answer is d

#3 the answer is a

#4 the answer is b