Lines of longitude range from 0 at the prime meridian to on a meridian in the mid-pacific ocean.

a.
90

b.
180

c.
60

d.
360

I'm pretty sure it's c. extremely gradual but not 100% sure though.

Your answer is d. silli hope this ! : ) i left an explanation down below if you need it: a sill forms when hot magma squeezes between layers of rock to form a hardened sheet of rock. a sill is basically a tabular sheet intrusion between old layers of sedimentary rock, volcanic beds, or in the direction of foliation inherent in metamorphic rock. the word sill means a concordant intrusive sheet.