Please select the eligibility criteria that correspond to the clinical trial below.
Title: A Phase 3, Multicenter, Randomized, Open-Label Study to Compare the Efficacy and Safety of Sofosbuvir/GS-5816 Fixed Dose Combination for 12 Weeks With Sofosbuvir and Ribavirin for 12 Weeks in Subjects With Chronic Genotype 2 HCV Infection
Brief Summary: The primary objectives of this study are to evaluate the efficacy, safety, and tolerability of treatment with sofosbuvir/velpatasvir (SOF/VEL) fixed-dose combination (FDC) for 12 weeks compared to treatment with sofosbuvir (SOF) plus ribavirin (RBV) for 12 weeks in participants with chronic genotype 2 hepatitis C virus (HCV) infection.


Options:
A: Inclusion Criteria:

* adult patients, 18-65 years of age;
* chronic hepatitis C, genotype 1;
* chronic liver disease consistent with CHC;
* compensated liver disease.

Exclusion Criteria:

* infection with any HCV genotype other than genotype 1;
* previous treatment for CHC;
* medical condition associated with chronic liver disease other than CHC;
* HIV, hepatitis A, hepatitis B infection.
B: Inclusion criteria:

1a. For treatment-naïve patients: no prior therapy with interferon, peginterferon, or ribavirin for acute or chronic hepatitis C infection

1b. For treatment-experienced patients: confirmed virological failure during or after combination treatment with an approved dose of alfa-2a or alfa-2b peginterferon combined with ribavirin; such patients must have received at least 12 weeks of therapy with a 90 day washout period prior to screening and must have documentation of medical history prior to enrolment in 1220.2 2. Age 18 years or older 3. Signed informed consent form prior to trial participation 4. Male or female with documented hysterectomy or menopausal female with last menstrual period at least 6 months prior to screening 5. Chronic hepatitis C infection of genotype 1, diagnosed by positive HCV serology test (HCV Ab positive) or detectable HCV RNA at least 6 months prior to screening 6. HCV viral load \>= 100,000 IU/mL at screening 7. TSH and T4 within normal limits or adequately controlled thyroid function 8. Histological evidence within 36 months prior to study enrolment of any degree of chronic necroinflammatory activity or the presence of fibrosis (Ishak Grade 1-4 or Metavir Grade 1-3)

Exclusion criteria:

1. Patients who have been previously treated with at least one dose of any protease inhibitor for acute or chronic hepatitis C infection
2. Evidence of liver disease due to causes other than chronic HCV infection
3. Positive ELISA for HIV-1 or HIV-2
4. Hepatitis B virus (HBV) infection based on presence of Hbs Ag or HBV DNA
5. Any previous liver biopsy consistent with cirrhosis
6. Decompensated liver diseases as evidenced by ascites, portal hypertension, jaundice or hepatic encephalopathy
7. Haemophilia
8. Hemoglobinopathy (e.g., thalassemia major or sickle cell anemia)
9. Severe pre-existing psychiatric disease
10. Poorly controlled diabetes mellitus
11. Ischaemic heart disease
12. Chronic obstructive airway disease
13. Autoimmune disease; including autoimmune hepatitis
14. History of alcohol abuse within the past 12 months
15. Hyperbilirubinemia (conjugated bilirubin) \>1.5x ULN
16. Alkaline phosphatase \>1.5x ULN
17. ALT and AST levels \>= 5 x ULN
18. Hemoglobin \< 12.0 g/dL for women and \< 13.0 g/dL for men
19. White blood cell count \< 2000 cells/mm3
20. Absolute Neutrophil Count \< 1500 cells/mm3
21. Platelet count \< 100,000 cells/mm3
22. Prothrombin time INR (Institutional Normalized Ratio) prolonged to \> 1.5 x ULN
23. Usage of any investigational drug within 30 days prior to enrolment; or the planned usage of an investigational drug during the course of the current study
24. Known hypersensitivity to study drugs
C: Key Inclusion Criteria:

* HCV treatment-naive adult participants (18-65 years of age) with chronic HCV infection and plasma HCV RNA ≥ 5 log10 IU/mL at screening
* Agree to use protocol defined precautions against pregnancy

Key Exclusion Criteria:

* Chronic liver disease of a non-HCV etiology (e.g., hemochromatosis, Wilson's disease, α1 antitrypsin deficiency, cholangitis)
* Evidence of cirrhosis
* Evidence of current drug abuse
* Screening laboratory results outside the protocol specified requirements

Note: Other protocol defined Inclusion/Exclusion criteria may apply.
D: Inclusion Criteria:

* Willing and able to provide written informed consent
* HCV RNA ≥ 10\^4 IU/mL
* HCV genotype 2
* Chronic HCV infection (≥ 6 months)
* Females of childbearing potential must have a negative serum pregnancy test
* Males and females of childbearing potential who engage in heterosexual intercourse must agree to use protocol specified method(s) of contraception
* Must be of generally good health, with the exception of chronic HCV infection, as determined by the investigator.

Exclusion Criteria:

* Current or prior history of clinically-significant illness (other than HCV that may interfere with treatment, assessment or compliance with the protocol;
* Screening electrocardiogram (ECG) with clinically significant abnormalities
* Laboratory results outside of acceptable ranges at Screening
* Pregnant or nursing female or male with pregnant female partner
* Chronic liver disease of a non-HCV etiology (e.g., hemochromatosis, Wilson's disease, alfa-1 antitrypsin deficiency, cholangitis)
* Infection with hepatitis B virus (HBV) or human immunodeficiency virus (HIV)

Answer: D