In the Area Immediately Surrounding an Igneous Intrusion,a Host Limestone

Multiple Choice

In the area immediately surrounding an igneous intrusion,a host limestone is locally metamorphosed to produce marble.Which of the following statements is correct?

A) The intrusive igneous rock must be younger than the limestone.
B) The limestone must be younger than the igneous rock.
C) The limestone must be younger than the marble.
D) The relative ages of the three units cannot be determined with the information given.