Answer:
External locus of control.
Explanation:
Attribution theory has two concepts that determine the attitude of a person towards an object or self.
The external locus of control: The external locus of control deals when a person blames or give all credit for their failure or success to the external source. It means a person believe in fate, luck, situation, etc. It is opposite to the internal locus of control.
- The internal locus of control
Thus Della is on an external locus of control where she believes in lucky guesses. She believes in fate, luck that is an external source.