Which sentence would be inappropriate in an informational piece of writing with a formal tone?

that year, army major h. c. wayne and naval lieutenant david d. porter were sent off in a supply ship to buy camels and bring them home.

congress refused the secretary of war's request for funds to purchase 1,000 camels for military use in the west.

the drivers found the camels ugly and often grumbled about their smell and how the camels spat at them and sometimes bit them.