Read the underlined sentence on page 4. "At this time of life, modest investments can deliver huge dividends." Which statement BEST explains how the author's word choice in the sentence contributes to the meaning of the passage. (1. The author uses the words "huge" and "modest" to contrast babies' brain growth with that of adults.) (2. The author uses the phrase "at this time" to show that brain development stops after a certain age.) (3. The author uses the phrase "can deliver" to show that scientists are still unsure about what impacts brain growth.) (4. The author uses the words "investments" and "dividends" to show that children's life experiences are valuable in brain development.