<em>I'm doing this question right now and it's fairly easy. :)</em>
<u>4 - The water pipes and fixtures in a building. (</u><u><em>plumbing)</em></u>
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<u>3 - A small, poorly built house or hut. (</u><u><em>hovel)</em></u>
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<u>2 - A servant who does the dirty, rough work in the kitchen. (</u><u><em>scullion)</em></u>
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<u>1 - An instrument that indicates time by the position of the shadows. (</u><u><em>sundial)</em></u>
The first one would be your answer, Imposing British governors in the colonies.
The two answers are as follows
"he was afraid that diem's defeat would cause communism to spread to other parts of asia"
and also
he did not want chi minh, a communist, to gain control of south vietnam
It is most likely because he believed that they could cause unnecessary conflict... that is just my educated guess