Please assess the completion status of the following clinical trial:

Trial Title: Preventing Cognitive Decline in African Americans With Mild Cognitive Impairment

Study Design Characteristics:
- Allocation: RANDOMIZED
- Intervention Model: PARALLEL
- Observational Model: None
- Primary Purpose: PREVENTION
- Time Perspective: None
- Masking: SINGLE
- Phase: PHASE3
- Number of Arms: 2.0

Eligibility Criteria:
Inclusion Criteria:~* Age 65 years and older~* Having a friend/relative willing to serve as a Knowledgeable Informant (KI)~* Diagnosis of aMCI-MD~* Self-identified as African American~Exclusion Criteria:~* Psychiatric diagnosis, including dementia and major depression~* Sensory deficits that preclude neuropsychological testing~* Institutional residence~* Reduced life expectancy due to known terminal illness

- Gender: ALL
- Minimum Age: 65 Years
- Maximum Age: None
- Healthy Volunteers: f

Study Arms:
- Behavior Activation (Type: EXPERIMENTAL): BA is a manual-based, behavioral treatment that helps people increase activity levels through goal setting, activity scheduling, graded task assignment, identifying avoidant behaviors, and rating one's sense of accomplishment.
- Supportive Therapy (ST) (Type: PLACEBO_COMPARATOR): ST is a person-centered treatment in which interventionists create a comfortable, non-judgmental environment by demonstrating genuineness, empathy, and acceptance of subjects without imposing any judgments on their decisions.

Based on this trial design, predict the completion outcome and termination type (if applicable).