Please assess the completion status of the following clinical trial:

Trial Title: A Study of VX-121 Combination Therapy in Participants With Cystic Fibrosis (CF) Who Are Homozygous for F508del, Heterozygous for F508del and a Gating (F/G) or Residual Function (F/RF) Mutation, or Have At Least 1 Other Triple Combination Responsive (TCR) CFTR Mutation and No F508del Mutation

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

Eligibility Criteria:
Key Inclusion Criteria:~* Participant has one of the following genotypes:~  * Homozygous for F508del;~ * Heterozygous for F508del and a gating (F/G) mutation;~ * Heterozygous for F508del and a residual function (F/RF) mutation;~ * At least 1 other TCR CFTR gene mutation identified as responsive to ELX/TEZ/IVA and no F508del mutation~* Forced expiratory volume in 1 second (FEV1) value \>=40% and \<=90% of predicted mean for age, sex, and height for participants currently receiving CFTR protein modulator therapy; FEV1 \>=40% and \<=80% for participants not currently receiving CFTR protein modulator therapy~Key Exclusion Criteria:~* History of solid organ or hematological transplantation~* Hepatic cirrhosis with portal hypertension, moderate hepatic impairment (Child Pugh Score 7 to 9), or severe hepatic impairment (Child Pugh Score 10 to 15)~* Lung infection with organisms associated with a more rapid decline in pulmonary status~* Pregnant or breast-feeding females~Other protocol defined Inclusion/Exclusion criteria may apply.

- Gender: ALL
- Minimum Age: 12 Years
- Maximum Age: None
- Healthy Volunteers: f

Study Arms:
- ELX/TEZ/IVA (Type: ACTIVE_COMPARATOR): Following elexacftor/tezacaftor/ivacaftor (ELX/TEZ/IVA) run-in period of 4 weeks, participants received ELX 200 milligram (mg) once daily (qd) /TEZ 100 mg qd/IVA 150 mg every 12 hours (q12h) in the treatment period for 52 weeks.
- VX-121/TEZ/D-IVA (Type: EXPERIMENTAL): Following ELX/TEZ/IVA run-in period of 4 weeks, participants received VX-121 20 mg qd/TEZ 100 mg qd/D-IVA 250 mg qd in the treatment period for 52 weeks.

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