Reservations in this context could mean doubts, such as 'My mom had reservations about going out to shop."
This means that their mom was not sure if she wanted to go shopping or not because she has reasons not to.
C. it has negative connotation
an author writing from the point of view of the Indians that were already making their home in America would use this type of language because when Columbus came to America he invaded a space that was already occupied. even though it was a discovery for Spain and England that did not know America existed it was an invasion to the Indians.
