through the marriage of Fujiwara daughters to emperors. It meant that the Fujiwara daughters were empresses, that their grandsons and nephews were emperors, and that members of their family, including its lesser branches, received all the patronage. Thus, the Fujiwara clan chieftain, whether he held office or not, could manipulate the reins of government.
<span>The Japanese reached Guadalcanal in May 1942. When the allied forces spotted construction of an airfield on Guadalcanal, It was one of the most hotly contested campaigns for control of the ground, sea and skies of the war. Guadalcanal became a major turning-point in the war as it stopped Japanese expansion.
-Wikepedia
This should answer all your questions. I hope it helped. Have a great night!
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Answer:
I would say c. building and roads systems
