Read the passage below:
When conservator Henri Laurent completed the gear cleaning of the Rouen celestial globe in 1993, he immediately set to work recalibrating its intricate lunar phase mechanism—a crucial task he had been forced to postpone ever since revealing the inner gear trains two years prior. Long before he ever touched a screwdriver to the device, however, Laurent had spent five years systematically photographing each of the globe's constellation engravings, a documentation process he concluded just before embarking on the main gear disassembly in 1991. The entire project had been delayed until 1988, when the museum board finally granted official approval for a full restoration. Yet even before that approval was secured, Laurent had already published his landmark monograph identifying the clockmaker's mark, having initially pulled the corroded artifact from the museum's damp basement back in 1984.
According to the passage, which of the following events occurred FIRST chronologically?
- Laurent pulling the corroded celestial globe from the museum basementCevap
- BLaurent publishing his monograph identifying the clockmaker's mark
- CLaurent receiving official approval from the museum board for full restoration
- DLaurent concluding the five-year photographic documentation of the engravings