The Adams Onis treaty established the northern border of Spanish territory at the parallel A. 48th
B. 36th
C. 42nd
D. 38th

Correct answer is C. 42nd.

Explanation:

C is the only correct answer as according to the Adams Onis Treaty signed between United States and Spain, Spain had ceded Florida and Oregon Country to United States. Therefore the border was established along the 42nd parallel.

All other options are therefore false.

answer; i believe that the correct answer is (agriculture);