Answer:
Option C, Eruption that will occur
Explanation:
The constituents of magma especially the amount of gas in it is highly responsible for making a volcanic eruption exclusive.
When a gas in entrapped with in a magma, a huge pressure is build on which keep on increasing with time and eventually it causes bursting of volcano thereby erupting magma. Also explosive eruptions causes pyroclastic flows which destroys everything coming in their path.
For example - Phreatomagmatic eruptions
Thus, the constituents of magma are important to determine the type of eruption that will occur.