To determine which statement is correct about the rocks at the location described, let's analyze each option:
A. All three types of rock will become metamorphic if they stay at the surface of Earth.
This is incorrect. While sedimentary and igneous rocks can become metamorphic rocks under certain conditions, remaining at the surface does not provide those conditions (i.e., sufficient heat and pressure needed for metamorphism).
B. If this location is buried deep underground, only the metamorphic rock will melt because it has already been heated before.
This is misleading. While metamorphic rocks are formed from the alteration of existing rocks under heat and pressure, they do not necessarily melt at the same temperatures as igneous or sedimentary rocks. All rock types can potentially melt if subjected to enough heat, but saying "only metamorphic rock will melt" is incorrect.
C. The metamorphic rock and sedimentary rock were already at this location and magma flowed into the other rocks.
This statement suggests the presence of an igneous intrusion that could occur in a geological setting, but it does not specify what the "other rocks" are or if they were indeed in that specific location prior to magma intrusion. Without specific context, this statement cannot be confirmed as correct.
D. The igneous rock will become metamorphic rock after the rock in the cliff side turns into sediment.
This statement is generally inaccurate. Igneous rocks do not become metamorphic rocks simply because sediment from other rocks forms; the transformation requires specific conditions of heat and pressure, not just the sedimentation process.
Given this analysis, none of the statements provided are entirely accurate or scientifically correct based on standard geological principles. If one had to select the least incorrect option, C about an igneous intrusion could be acceptable under specific contexts, but it lacks definitive accuracy as posed. To give a definitive answer, further context on geological processes or the specific location would be necessary.