Answer
a. and b.
Work Step by Step
a. Freshly brewed coffee has a uniform texture and composition, so it is a homogeneous mixture.
b. Vinegar has a uniform texture and composition, so it is a homogeneous mixture.
c. White bread is a heterogeneous mixture because it does not look uniform.
d. Sliced ham doesn't have a homogeneous look to it, so it is a heterogeneous mixture.
