Which of the following is one of the reasons that native american slavery declined quickly? 1.the spanish and native american populations mixed. 2.native americans did not know how to farm european crops. 3.the spanish converted many native americans to christianity. 4.native americans were susceptible to european diseases and many died.

The correct answer is 4. Native Americans were suceptible to European diseases and many died.

Explanation

The scientific community affirms that in the conquest of the new world there was a great demographic catastrophe in America originated by two main factors, the first was cruelty and the second was the arrival of epidemics to which the natives could not oppose, for example, the Aztec culture was affected during the first half of the sixteenth century due to the epidemics of smallpox and measles that occurred in its territory with symptoms never seen before by the natives. Other historians affirm that around 95% of the deaths of indigenous people in the New World were related to diseases such as influenza, typhus, and bubonic plague, this caused the Native Americans did not perform well in the work and because of this, Native Americans slavery did not last much and instead slavers were forced to bring African slaves to the New World who were resistant to diseases that  killed and affected Native Americans. So, the correct answer is 4. Native Americans were susceptible to European diseases and many died.

the answer is b, encourage free trade