What is the Difference Between Mary's Response and Zechariah's?

About this sermon

http://www.catholic.com Zechariah and Mary give seemingly similar questions in response to Gabriel telling them that they will have children under impossible circumstances; yet Zechariah is struck dumb for it, while Mary is praised. Jimmy Akin explains the difference in what the two of them asked, to show why each response merited its consequence. Jimmy Akin is an internationally known author and speaker. As the senior apologist at Catholic Answers, he has more than twenty years of experiencing defending and explaining the Faith. Jimmy is a convert to the Faith and has an extensive background in the Bible, theology, the Church Fathers, philosophy, canon law, and liturgy. Jimmy is a weekly guest on the national radio program Catholic Answers Live, a regular contributor to Catholic Answers Magazine, and a popular blogger and podcaster. His personal web site is JimmyAkin.com.