Which of the following Latin American nations did not win independence from European control until the 20th Century?

Grenada did not achieve independence from European control until the 20th century, specifically gaining independence from the United Kingdom in 1974. This sets it apart from the other options, which all obtained their independence much earlier. Venezuela, Ecuador, and Paraguay were part of the wave of independence movements that swept through Latin America during the early 19th century, largely in response to the Napoleonic Wars and the weakening of Spanish and Portuguese colonial powers. Consequently, these nations declared their independence in the 1810s and 1820s, securing their sovereignty well before Grenada's pivotal moment in the 20th century. This historical context highlights why Grenada stands out as the correct response to the question regarding the timing of independence among these nations.