Pls help :(

When Lincoln says, in lines 20-21, "we here highly resolve that they dead shall not
have died in vain," he is encouraging his listeners to...
O
dedicate a portion of the field as a final resting place
seek revenge on those who killed the brave, proud soldiers
finish the work of freeing all people who are help in bondage
strengthen their support for the Union cause

The correct answer is strengthen their support for th union so D

Explanation:

The answer to the last question (i included 2 photos of the answer the the last question on the test the long question)

the answer to fill in the blank in this question would be the word resource, it is defined as the money, material or people (since human resource is a very valuable good) that a company or a person has at disposition (meaning they can use the resource as they see fit), to be able to complete a task or achieve a goal.