Arrange the following sentences in the correct order to form a meaningful paragraph. A. Most people get infected by handling reptiles and then touching their mouths or an open cut. B. At first, they look like perfect pets: exotic, quiet and tidy, but lizards and other pets can harbour a salmonella bacterium that makes people sick. C. A study estimates that in 1995, there were as many as 6,700 reptile-caused salmonella infections. D. Salmonella is a genus of rod-shaped gram-negative bacteria of the family Enterobacteriaceae.

1. BDCA
2. BCDA
3. ACDB
4. BCAD