Iwill give brainliest, rank, and if two people answer correctly!

which statement describing an advantage of constantinople's location is correct?

a) it did not need to build any defenses against an attack from the sea.
b) it was situated on an important natural seafaring trade route.
c) it lay near the geographic center of the western roman empire.
d) it was close to the natural resources of spain, gaul, and britain