A. SIAM
Explanation:
The crisis of 1893 erupted, caused by French demands for Laotian territory east of Mekong. THAILAND is the only Southeast Asian nation never to have been colonised by a Western power, in part because Britain and France agreed in 1896 to make the Chao Phraya valley a buffer state.
Siam Is The Old Name Of Thailand..
Siam joined World War I siding with the allies, a political decision to amend the unequal treaties. Following a bloodless revolution in 1932, Siam became a constitutional monarchy and changed its official name to "Thailand".
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