Read the excerpt from The Secret Garden. "That's fresh air," she [Mary] said. "Lie on your back and draw in long breaths of it. That's what Dickon does when he's lying on the moor. He says he feels it in his veins and it makes him strong and he feels as if he could live for ever and ever. Breathe it and breathe it."

Which event is foreshadowed in this excerpt?

A)the arrival of spring

B)a dramatic improvement in Colin's health

C)the growing friendship between Mary and Colin

D)Colin's ability to live forever