Which maintains the tone established in these three sentences? carol was heartbroken when she heard that her faithful dog, harvey was very sick. flinging herself on her bed, she burst into tears. not even surgery would her poor dog. a) carol sighed heavily and then straightened up, determined to stay optimistic. b) carol was so unhappy, but she realized she could spend time with her friend, lena's dog. c) carol dried her eyes and called her friend lena because she could always cheer carol up. d) carol cried for hours, then reached for her phone and called the only person who would understand her sadness.