Please help!!!!

A student reads that the Mid-Atlantic ridge is growing wider every year as the North American and Eurasian plates move apart. Why is the separation between the two plates of little concern?

a. the separation occurs slowly at the rate of only a few centimeters a year

b. the magnetic force acting between the two plates remains strong

c. the seafloor between the two plates continues to hold them together

d. a landmass bridges the gap that is created by the separation of the two plates