Question

If you examine a rock sample and observe fossils in it, what type of rock does the sample represent?
a. igneous
b. metamorphic
c. sedimentary
d. fossils are found in several of the types listed above

Answer 1

If you examine a rock sample and observe fossils in it, the type of rock the sample represent in C - sedimentary. Igneous rock is  a melted and cooled rock and there are no remains of any kind of fossils. Still, can be found some fossils traces in some metamorphic rocks with the lowest grade of metamorphism but those are very very rare. 
the answer is C, sedimentary 

Answer 2

Sedimentary rocks are the only ones that have the ability to preserve a fossil.