Celery Stalks That Are Immersed in Fresh Water for Several

Multiple Choice

Celery stalks that are immersed in fresh water for several hours become stiff and hard. Similar stalks left in a 0.15 M salt solution become limp and soft. From this we can deduce that

A) the fresh water and the salt solution are both hypertonic to the cells of the celery stalks.
B) the fresh water and the salt solution are both hypotonic to the cells of the celery stalks.
C) the fresh water is hypotonic and the salt solution is hypertonic to the cells of the celery stalks.
D) the fresh water is hypertonic and the salt solution is hypotonic to the cells of the celery stalks.
E) the fresh water is isotonic and the salt solution is hypertonic to the cells of the celery stalks.