Analyze the map below and answer the question that follows. A satellite map of Central America. Land areas are circled and labeled 1, 2, 3, 4, and 5. 1 is a peninsula near Northwest Mexico and California. 2 is a plains region in Mexico. 3 is a mountain range in Mexico. 4 is a peninsula near Guatemala and Belize. 5 is Panama.
Image courtesy of NASA

The landform located at number 5 on the map above is a(n) .
A.
isthmus
B.
peninsula
C.
estuary
D.
island

Please select the best answer from the choices provided
A
B
C
D