D. All of the above
The Guadalcanal campaign lasted for months and American troops fought through swampy marshes and took heavy casualties from the Japanese, as the Japanese were very unlike other troops, in which they did not know the art of surrendering, and was forced to fight to the death for the "Rising Sun". As there were swampy marshes on the island, tropical diseases was rampant, as well as troop movements were slowed to a crawl.
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Im stuck between a and d its like they both seem right, sorry.
Here are some reasons: They were curious. They were just natural born explorers. They wanted to spread their religion.
