Answer:
B) He was worried about losing South Vietnam to communism.
Explanation:
President Johnson tried to attract as many countries as he could with the More Flags Campaign, to give an idea that the "Free World" was fighting communism, even though the adjective "Free" is more a euphemism than a reality due to the presence of countries like South Korea or the Philippines Many nations sent aid, mainly in the form of medical supplies, something well seen by the population of the sending and receiving country; but only seven assigned soldiers to the Peninsula: the South Korean dictatorship sent 200 men in 1965 and the quota was increased to 47,829 soldiers in 1967; Thailand contributed a total of 11,568 soldiers, also allowed the United States to use its territory to operate B-52 bombers, fighters, reconnaissance aircraft and the Infiltration Surveillance Center; Australia ended up allocating a division, first with advisors in 1962, then with 1400 soldiers, some veterans of the fight in the Malaysian jungles, and finally with a maximum number of 7672 soldiers and officers in 1967, so they became an important American ally and experienced in a very hostile territory such as the jungle, would retire in December 1972. Smaller shares were the Philippines (2000 soldiers), Taiwan (31 men) and Spain with several groups of 13 military doctors.