Please assess the completion status of the following clinical trial:

Trial Title: A Study of ProQuad in Healthy 4 to 6 Year Old Children (V221-014)

Study Design Characteristics:
- Allocation: RANDOMIZED
- Intervention Model: PARALLEL
- Observational Model: None
- Primary Purpose: PREVENTION
- Time Perspective: None
- Masking: DOUBLE
- Phase: PHASE3
- Number of Arms: 3.0

Eligibility Criteria:
Inclusion Criteria:~* In good health~* Received primary dose of M-M-R II at less than or equal to 12 months of age~* Received primary dose of Varivax at less than or equal to 12 months of age~* Negative history of varicella, zoster, measles, mumps, and rubella~Exclusion Criteria:~* history of receiving more than once dose of M-M-R II or Varivax~* Any immune impairment or deficiency~* Exposure to measles, mumps, rubella, varicella, or zoster in the 4 weeks prior to vaccination~* Vaccination with an inactive vaccine with in the past 14 days~* Vaccination with a live vaccine within the past 30 days~* Receipt of immune globulin, or blood product in the past 5 months

- Gender: ALL
- Minimum Age: 4 Years
- Maximum Age: 6 Years
- Healthy Volunteers: t

Study Arms:
- 1 (Type: EXPERIMENTAL): ProQuad + Placebo
- 2 (Type: ACTIVE_COMPARATOR): M-M-R II + Placebo
- 3 (Type: ACTIVE_COMPARATOR): M-M-R II + Varivax

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