Read the excerpt from Steve Jobs: The Man Who Thought Different below and answer the question.

Clara and Paul Jobs, a modest San Francisco couple with some high school education, had been waiting for a baby. When the call came in the middle of the night, they jumped at the chance to adopt the newborn, and they named him Steven Paul.
What is the meaning of the word "modest" as it is used in the excerpt above?

hesitant
average
extreme
excessive