What property or properties does a function f(x) share with the quadratic approximation a x=a, Q(x)?

a) they both pass through the same point at a, so f(a)=Q(a)

b) they both have the same concavity at a, so f(a)=Q(a)

c) they look the same when you zoom in close enough

d) they both have the same derivative at a so f(a)=Q(a)