Which of the following cognitive biases refers to people's tendency to attribute their successes to personal ability and effort, and failures to forces outside their control?

self serving bias

Explanation:

Self-serving bias as described by the social psychologist refers to the tendency of the people to give themselves the credit for the positive events and blame external factors for the negative actions. For example, a director gives himself the credit for the success of his movie but if it fails he blame actors for it.