Please select the arm or intervention descriptions that belong to the clinical trial below.
Title: SMS Mobile Technology to Improve Early Childhood Vaccine Coverage in Guatemala
Brief Summary: This project plans to learn more about whether sending text messages to parents on their mobile phones to remind them when their child is due for his or her next vaccination will improve children getting vaccinated on time.


Options:
A: Arm Label: Usual Care; Type: NO_INTERVENTION; Interventions: N/A | Arm Label: Reminders; Type: EXPERIMENTAL; Interventions: Behavioral: Reminders | Intervention Type: BEHAVIORAL; Name: Reminders; Assigned to Arm(s): Reminders
B: Arm Label: Short Message Service (SMS) group; Type: ACTIVE_COMPARATOR; Interventions: Behavioral: SMS message | Arm Label: Usual care; Type: PLACEBO_COMPARATOR; Interventions: Other: Usual care | Intervention Type: BEHAVIORAL; Name: SMS message; Assigned to Arm(s): Short Message Service (SMS) group | Intervention Type: OTHER; Name: Usual care; Assigned to Arm(s): Usual care
C: Arm Label: Intervention; Type: EXPERIMENTAL; Interventions: Other: A customized windows® software application | Arm Label: Control; Type: NO_INTERVENTION; Interventions: N/A | Intervention Type: OTHER; Name: A customized windows® software application; Assigned to Arm(s): Intervention
D: Arm Label: Low Flat Rate without Lottery; Type: EXPERIMENTAL; Interventions: Other: Conditional Cash Transfer, Other: SMS Reminder | Arm Label: Low Flat Rate with Lottery; Type: EXPERIMENTAL; Interventions: Other: Conditional Cash Transfer, Other: SMS Reminder | Arm Label: Low Sharp Rate without Lottery; Type: EXPERIMENTAL; Interventions: Other: Conditional Cash Transfer, Other: SMS Reminder | Arm Label: Low Sharp Rate with Lottery; Type: EXPERIMENTAL; Interventions: Other: Conditional Cash Transfer, Other: SMS Reminder | Arm Label: High Flat Rate without Lottery; Type: EXPERIMENTAL; Interventions: Other: Conditional Cash Transfer, Other: SMS Reminder | Arm Label: High Flat Rate with Lottery; Type: EXPERIMENTAL; Interventions: Other: Conditional Cash Transfer, Other: SMS Reminder | Arm Label: High Sharp Rate without Lottery; Type: EXPERIMENTAL; Interventions: Other: Conditional Cash Transfer, Other: SMS Reminder | Arm Label: High Sharp Rate with Lottery; Type: EXPERIMENTAL; Interventions: Other: Conditional Cash Transfer, Other: SMS Reminder | Arm Label: Easypaisa Flat Rate without Lottery; Type: EXPERIMENTAL; Interventions: Other: Conditional Cash Transfer, Other: SMS Reminder | Arm Label: Easypaisa Flat Rate with Lottery; Type: EXPERIMENTAL; Interventions: Other: Conditional Cash Transfer, Other: SMS Reminder | Arm Label: SMS Reminder Only; Type: EXPERIMENTAL; Interventions: Other: SMS Reminder | Arm Label: Control; Type: NO_INTERVENTION; Interventions: N/A | Intervention Type: OTHER; Name: Conditional Cash Transfer; Assigned to Arm(s): Easypaisa Flat Rate with Lottery, Easypaisa Flat Rate without Lottery, High Flat Rate with Lottery, High Flat Rate without Lottery, High Sharp Rate with Lottery, High Sharp Rate without Lottery, Low Flat Rate with Lottery, Low Flat Rate without Lottery, Low Sharp Rate with Lottery, Low Sharp Rate without Lottery | Intervention Type: OTHER; Name: SMS Reminder; Assigned to Arm(s): Easypaisa Flat Rate with Lottery, Easypaisa Flat Rate without Lottery, High Flat Rate with Lottery, High Flat Rate without Lottery, High Sharp Rate with Lottery, High Sharp Rate without Lottery, Low Flat Rate with Lottery, Low Flat Rate without Lottery, Low Sharp Rate with Lottery, Low Sharp Rate without Lottery, SMS Reminder Only

Answer: B