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The correct answer is option 1, Gravity Recovery and Interior Laboratory (GRAIL). In 2011, NASA launched the GRAIL mission with the objective of studying the Moon`s internal structure from its crust to its core. GRAIL consisted of two spacecraft that were placed in a polar lunar orbit.
Option 2, Fast Auroral Snapshot Explorer Spacecraft (FAST), is not correct. FAST was a spacecraft launched by NASA in 1996 to study the polar auroras and their impact on Earth`s magnetosphere.
Option 3, Ultraviolet Spectroscopic Explorer Spacecraft (UVSEE), is also not correct. UVSEE was a satellite that was launched by NASA in 1999 to observe astronomical objects in the ultraviolet wavelength range.
Option 4, Transition Region and Coronal Explorer (TRACE) Spacecraft, is also not correct. TRACE was a NASA spacecraft that was launched in 1998 to study the Sun`s transition region and corona.
Therefore, the correct answer is option 1, GRAIL, which was specifically designed to study the Moon`s internal structure.