Final answer:
The phrasing in the description points to Miss Welland having a happy expression, deduced from her rosy face and radiant eyes.
Step-by-step explanation:
Miss Welland's expression in the given context is happy (1). The text describes her face as growing rosy and her eyes as radiant, which are typical signs of happiness. Additionally, the language used, such as 'radiant' and 'dawn', conveys a positive and joyful atmosphere.
The description given in the question suggests that Miss Welland's expression was happy. The use of phrases like 'face grew rosy as the dawn' and 'radiant eyes' typically symbolizes cheerfulness and contentment, indicating a positive emotion on her part. Therefore, the correct answer is option 1) Happy.