This question is missing the excerpt. I've found the complete question online. The word in bold is as follows:
That is my purpose, upon the next meeting of Congress to again recommend the adoption of a practical measure tendering pecuniary aid to the free acceptance or rejection of all slave States, so called, the people whereof may not then be in rebellion against the United States...
Answer:
The meaning of the word in bold is:
A. Financial.
Step-by-step explanation:
The word "pecuniary" is used to refer to anything related to or consisting of money. For instance, if you are given a pecuniary gift, that means you are given money. In the excerpt above, President Lincoln states he is going to recommend a financial support (pecuniary aid) to certain states in order to prevent their rebellion against the United States as well as encourage the abolition of slavery.