Will upvote
which of the following best defines the principle of cross-cutting relationships?

a. cross-cutting rocks, such as an igneous intrusion, are younger than the rocks they cut through

b. only sedimentary rocks can cut through other sedimentary layers

c. when an igneous rock cuts through a sedimentary rock, the igneous rock must be older than the sedimentary rock

d. any rock that cuts through another rock will contain older fossils than the rock it cuts through