Read the paragraph about a career in math.

For people with highly mathematical minds, one of the most financially rewarding careers is that of actuary. An actuary is a person who predicts the amount of risk in any given set of circumstances. For example, an actuary predicts how great the risk is of a car collision based on many factors. Actuaries can make a high salary because their skills are in high demand. , to be an actuary is not easy; an actuary must pass ten levels of actuary exams, which can take years to study for. Nevertheless, this occupation can be an excellent career choice for mathematical people.

Choose the best replacement for the transition.

However
So
For instance
In addition