Which of the following is a good indicator of economic stability?

a. foreign policy

c. general price levels

b. general foreign trade

d. job-related safety

The first three answers are names for phenomena which are neither positive nor negative: foreign policy is not specific enough. Also general price levels and general trade don't yet tell us enough about whether those are positive or negative.

The best answer is job-related safety: a place with an economy stability would have job stability!