Final answer:
April is most likely to exhibit secure attachment after being dropped off for her first day of preschool.
Step-by-step explanation:
Based on the information provided in the readings and lectures, April is most likely to exhibit secure attachment after being dropped off for her first day of preschool.
Secure attachment is characterized by the child preferring their parent over a stranger, using the parent as a secure base to explore the environment, and seeking out the parent in times of stress. Securely attached children are distressed when their caregivers leave but are happy to see them when they return.
Therefore, April is likely to experience some distress when her parent leaves her at preschool but will be happy to see them when they come back.