David is preparing for a dance competition. He needs to practice for 14 hours in 5 days. Which of the following statements show that David is practicing according to the required rate? A.
55 hours in 10 days
B.
67 hours in 12 days
C.
28 hours in 10 days
D.
22 hours in 15 days

B is your answer

Step-by-step explanation:

large crystals result from very slow cooling.

evaporation of water: this would produce an evaporite which is a sedimentary rock. like a salt pan in a desert. not possible to have volcanic rocks originate this way.

crystalization in molten earth: slow cooling over time. (hundreds to millions of years)

crystalization at earth's surface: this results in fast cooling. (a few hours to a few months or years)

crystalization from cooling off hot water: that would be a hydrothermal deposit. while associated with volcanics they are not volcanic rocks themselves and usually occur fairly rapidly.