Read the passage below.

Rosario spent the last three years earning her underwater cave diving certification. , she will be guiding an underwater film crew next summer.

The best signal word to start the second sentence is .
A. However
B. As a result
C. Similarly
D. In conclusion

The greatest gift the sumerians gave the world was the invention of writing. the sumerians were wealthy people. they needed some way to keep track of what they owned. they began drawing pictures. they used a reed as a pen. they drew on soft pieces of clay. the soft clay was then dried in the sun. the tablet became a permanent record. later, the sumerian drawings changed into wedge-shaped symbols. this kind of writing is called cuneiform. by putting symbols together, the sumerians could write entire sentences.