单项选择题
The U.S. Navy on Wednesday admitted an Egyptian was killed this week when shots were fired from a military-contracted cargo ship at a boat near the Suez Canal. The United States originally said no one died in Monday’s encounter between the cargo Vessel Global Patriot and three small boats near the Suez Canal. When the boats approached the Global Patriot, a native Arabic speaker using a bullhorn warned the vessels to turn away, the U.S. Embassy in Cairo, Egypt, said. "’A warning flare was then fired," the embassy said in a statement. "One small boat continued to approach the ship and received two sets of warning shots." The embassy said Wednesday it appears that [9lone of the warning shots killed an Egyptian on the approaching boat. The embassy did not mention anyone being wounded. Egyptian media reports said two people were wounded in addition to the death. A senior U.S. military official said an armed military security team was on board for the canal transit. An Egyptian security official, speaking to the AP on condition of anonymity, said the merchants know not to approach military vessels, but the fact that the Global Patriot was a civilian vessel might have led to confusion.
The Egyptian boat continued to approach the American ship probably because（）。 A. the Egyptians thought it was OK to approach military vessels.
B. the ship was a civilian vessel and caused misunderstanding.
C. the Egyptians did not understand the words of warning.
D. no warning flare was fired by the U.S. navy on the ship.