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.

C

Explanation:

The answer C sounds more like the way that you would describe the story to a friend, which would be very informal.  Answers A, and B sound more like the way you might tell the story to your teacher in a report.

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fertilization, pictured in figure 24.23a is the process in which gametes (an egg and sperm) fuse to form a zygote. the egg and sperm each contain one set of chromosomes. to ensure that the offspring has only one complete diploid set of chromosomes, only one sperm must fuse with one egg. in mammals, the egg is protected by a layer of extracellular matrix consisting mainly of glycoproteins called the zona pellucida. when a sperm binds to the zona pellucida, a series of biochemical events, called the acrosomal reactions, take place. in placental mammals, the acrosome contains digestive enzymes that initiate the degradation of the glycoprotein matrix protecting the egg and allowing the sperm plasma membrane to fuse with the egg plasma membrane, as illustrated in figure 24.23b. the fusion of these two membranes creates an opening through which the sperm nucleus is transferred into the ovum. the nuclear membranes of the egg and sperm break down and the two haploid genomes condense to form a diploid genome.

explanation: