What Is the Best Response to a Parent of a 2-Month-Old

What is the best response to a parent of a 2-month-old infant who asks when the infant should first receive the measles vaccine?

A) "Your baby can get the measles vaccine now."
B) "The first dose is given any time after the first birthday."
C) "She should be vaccinated between 4 and 6 years of age."
D) "This vaccine is administered when the child is 11 years old."