Transitional phrases, as the name suggest, are employed to guide readers and shift them from one idea to another. They are also utilized two connect multiple paragraphs within a write-up. They must be called the that improve any writer's flow.
Here are a few circumstances concerning the use of transitions:
1. To add 2. To compare 3. To contrast 4. To illustrate 5. To emphasize 6. To restate 7. To show the consequence.
Of the seven conditions mentioned above, the transition that fits in the statement provided in the query seems to be number 7 (to show consequence).
Therefore it would right to state option-"C" makes the right sense. So, the answer is:
"as a result"