What influences the path that surface currents take?

a. salinity and earth's rotation
b. wind forces and earth's rotation
c. differences in density and temperature
d. wind forces and salinity

c.) polymerase chain reaction

- "unlike the original dna fingerprinting method, dna profiling does not use restriction enzymes to cut the dna. instead it uses the polymerase chain reaction (pcr)? to produce many copies of specific str sequences. pcr is an automated procedure that generates lots of copies of a specific sequence of dna."

i think the answer would be d